diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78c763d7c0..d10f9ada03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,21 @@
+# 9.5.0
+
+### Added
+- It's now possible to style `<summary>` elements as buttons and have them appear in the active/selected state when the enclosing [`<details>` element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details) is open. #346
+
+### Changes
+- Updates our release candidate versioning logic so that prerelease increments are done on a per-module basis, fixing #350.
+
+# 9.4.0
+
+### Added
+- Add `v-align-baseline` class to `primer-utilities` #324
+- Add deprecation warnings for `primer-cards` and `primer-forms/lib/form-validation.scss` #347 (these will be removed in v10.0.0)
+
+### Changes
+- Update npm metadata for `primer-css`, `primer-core`, `primer-product`, and `primer-marketing` #328
+- Remove `HEAD` heading from the changelog #327
+
 # 9.3.0
 
 ## Added
diff --git a/modules/primer-alerts/package.json b/modules/primer-alerts/package.json
index d7a08c8fd2..44cac5c1aa 100644
--- a/modules/primer-alerts/package.json
+++ b/modules/primer-alerts/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.4.0",
+  "version": "1.5.0",
   "name": "primer-alerts",
   "description": "Flash messages, or alerts, inform users of successful or pending actions.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "alerts",
diff --git a/modules/primer-avatars/package.json b/modules/primer-avatars/package.json
index fc7da1e9bf..ca827d73cd 100644
--- a/modules/primer-avatars/package.json
+++ b/modules/primer-avatars/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-avatars",
   "description": "Basic styles for user profile avatars.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "avatars",
diff --git a/modules/primer-base/package.json b/modules/primer-base/package.json
index ea52df0a76..835966cf38 100644
--- a/modules/primer-base/package.json
+++ b/modules/primer-base/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.4.0",
+  "version": "1.5.0",
   "name": "primer-base",
   "description": "CSS to reset the browsers default styles",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-blankslate/package.json b/modules/primer-blankslate/package.json
index 40f49da61b..641b08af41 100644
--- a/modules/primer-blankslate/package.json
+++ b/modules/primer-blankslate/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-blankslate",
   "description": "Blankslates are for when there is a lack of content within a page or section.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-box/package.json b/modules/primer-box/package.json
index d62ca6a5db..ee2e793e39 100644
--- a/modules/primer-box/package.json
+++ b/modules/primer-box/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "2.4.0",
+  "version": "2.5.0",
   "name": "primer-box",
   "description": "A module for creating rounded-corner boxes with options for headers, lists, and footers.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-breadcrumb/package.json b/modules/primer-breadcrumb/package.json
index 43ae26192a..912361d1a6 100644
--- a/modules/primer-breadcrumb/package.json
+++ b/modules/primer-breadcrumb/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-breadcrumb",
   "description": "Breadcrumb navigation for pages with parents / grandparents.",
   "homepage": "http://primercss.io/",
@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "breadcrumb",
diff --git a/modules/primer-buttons/README.md b/modules/primer-buttons/README.md
index f14e0f2155..807b218181 100644
--- a/modules/primer-buttons/README.md
+++ b/modules/primer-buttons/README.md
@@ -245,6 +245,25 @@ Use `.hidden-text-expander` to indicate and toggle hidden text.
 
 You can also make the expander appear inline by adding `.inline`.
 
+
+#### Using button styles with the details summary element
+
+You can add `.btn` and `.btn-*` classes to any
+[`<summary>`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/summary)
+element so that it gains the appearance of a button, and
+selected/active styles when the parent
+[`<details>`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details)
+element is open.
+
+```html
+<details>
+  <summary class="btn btn-block btn-primary">Toggle the content</summary>
+  <p class="mt-2">
+    This content will be toggled.
+  </p>
+</details>
+```
+
 <!-- %enddocs -->
 
 ## License
diff --git a/modules/primer-buttons/package.json b/modules/primer-buttons/package.json
index 374e849743..f8d4284728 100644
--- a/modules/primer-buttons/package.json
+++ b/modules/primer-buttons/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "2.3.0",
+  "version": "2.4.0",
   "name": "primer-buttons",
   "description": "A collection of buttons used for primary and secondary actions.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-cards/package.json b/modules/primer-cards/package.json
index e7b65d9bdd..8cda730018 100644
--- a/modules/primer-cards/package.json
+++ b/modules/primer-cards/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.4.1",
+  "version": "0.5.0",
   "name": "primer-cards",
   "description": "Card-like containers to group semantically related content together on marketing websites at GitHub.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "cards",
diff --git a/modules/primer-core/package.json b/modules/primer-core/package.json
index 95e6ebbcc9..c0a6aabcf8 100644
--- a/modules/primer-core/package.json
+++ b/modules/primer-core/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "6.3.1",
+  "version": "6.4.0",
   "name": "primer-core",
   "description": "Primer CSS's core modules",
   "homepage": "http://primercss.io/",
@@ -25,16 +25,16 @@
     "test": "npm run build"
   },
   "dependencies": {
-    "primer-base": "1.4.0",
-    "primer-box": "2.4.0",
-    "primer-buttons": "2.3.0",
-    "primer-forms": "1.3.1",
-    "primer-layout": "1.3.0",
-    "primer-navigation": "1.3.0",
-    "primer-support": "4.3.0",
-    "primer-table-object": "1.3.0",
-    "primer-tooltips": "1.3.0",
-    "primer-truncate": "1.3.0",
-    "primer-utilities": "4.7.0"
+    "primer-base": "1.5.0",
+    "primer-box": "2.5.0",
+    "primer-buttons": "2.4.0",
+    "primer-forms": "1.4.0",
+    "primer-layout": "1.4.0",
+    "primer-navigation": "1.4.0",
+    "primer-support": "4.4.0",
+    "primer-table-object": "1.4.0",
+    "primer-tooltips": "1.4.0",
+    "primer-truncate": "1.4.0",
+    "primer-utilities": "4.8.0"
   }
 }
diff --git a/modules/primer-css/package.json b/modules/primer-css/package.json
index 57ba7529e8..2dd8c0f66d 100644
--- a/modules/primer-css/package.json
+++ b/modules/primer-css/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "9.4.0",
+  "version": "9.5.0",
   "name": "primer-css",
   "description": "Primer is the CSS framework that powers GitHub's front-end design. Primer-css includes 23 packages that are grouped into 3 core meta-packages for easy install. Each package and meta-package is independently versioned and distributed via npm, so it's easy to include all or part of Primer within your own project.",
   "homepage": "http://primercss.io/",
@@ -25,33 +25,33 @@
     "test": "npm run build"
   },
   "dependencies": {
-    "primer-alerts": "1.4.0",
-    "primer-avatars": "1.3.0",
-    "primer-base": "1.4.0",
-    "primer-blankslate": "1.3.0",
-    "primer-box": "2.4.0",
-    "primer-breadcrumb": "1.3.0",
-    "primer-buttons": "2.3.0",
-    "primer-cards": "0.4.1",
-    "primer-core": "6.3.1",
-    "primer-forms": "1.3.1",
-    "primer-labels": "1.4.0",
-    "primer-layout": "1.3.0",
-    "primer-markdown": "3.6.0",
-    "primer-marketing": "5.3.1",
+    "primer-alerts": "1.5.0",
+    "primer-avatars": "1.4.0",
+    "primer-base": "1.5.0",
+    "primer-blankslate": "1.4.0",
+    "primer-box": "2.5.0",
+    "primer-breadcrumb": "1.4.0",
+    "primer-buttons": "2.4.0",
+    "primer-cards": "0.5.0",
+    "primer-core": "6.4.0",
+    "primer-forms": "1.4.0",
+    "primer-labels": "1.5.0",
+    "primer-layout": "1.4.0",
+    "primer-markdown": "3.7.0",
+    "primer-marketing": "5.4.0",
     "primer-marketing-support": "1.3.0",
-    "primer-marketing-type": "1.3.0",
-    "primer-marketing-utilities": "1.3.0",
-    "primer-navigation": "1.3.0",
-    "primer-page-headers": "1.3.0",
-    "primer-page-sections": "1.3.0",
-    "primer-product": "5.3.1",
-    "primer-support": "4.3.0",
-    "primer-table-object": "1.3.0",
-    "primer-tables": "1.3.0",
-    "primer-tooltips": "1.3.0",
-    "primer-truncate": "1.3.0",
-    "primer-utilities": "4.7.0"
+    "primer-marketing-type": "1.4.0",
+    "primer-marketing-utilities": "1.4.0",
+    "primer-navigation": "1.4.0",
+    "primer-page-headers": "1.4.0",
+    "primer-page-sections": "1.4.0",
+    "primer-product": "5.4.0",
+    "primer-support": "4.4.0",
+    "primer-table-object": "1.4.0",
+    "primer-tables": "1.4.0",
+    "primer-tooltips": "1.4.0",
+    "primer-truncate": "1.4.0",
+    "primer-utilities": "4.8.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-forms/package.json b/modules/primer-forms/package.json
index fc170f2039..4d90f9cbcd 100644
--- a/modules/primer-forms/package.json
+++ b/modules/primer-forms/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.1",
+  "version": "1.4.0",
   "name": "primer-forms",
   "description": "Style individual form controls and utilize common layouts.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-labels/package.json b/modules/primer-labels/package.json
index 3abfbf89e4..18dfc2db0e 100644
--- a/modules/primer-labels/package.json
+++ b/modules/primer-labels/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.4.0",
+  "version": "1.5.0",
   "name": "primer-labels",
   "description": "Labels add metatdata or indicate status of items and navigational elements.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-layout/package.json b/modules/primer-layout/package.json
index a783d60056..8565eb437d 100644
--- a/modules/primer-layout/package.json
+++ b/modules/primer-layout/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-layout",
   "description": "Containers, rows, and columns for creating page layout.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-markdown/package.json b/modules/primer-markdown/package.json
index 4324d34a76..0616cb3da7 100644
--- a/modules/primer-markdown/package.json
+++ b/modules/primer-markdown/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "3.6.0",
+  "version": "3.7.0",
   "name": "primer-markdown",
   "description": "GitHub stylesheets for rendering markdown.",
   "homepage": "https://github.com/primer/primer-markdown",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "github",
diff --git a/modules/primer-marketing-type/package.json b/modules/primer-marketing-type/package.json
index 58f8a89825..a74b646640 100644
--- a/modules/primer-marketing-type/package.json
+++ b/modules/primer-marketing-type/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-marketing-type",
   "description": "Typography for marketing websites at GitHub",
   "homepage": "http://primercss.io/",
@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "css",
diff --git a/modules/primer-marketing-utilities/package.json b/modules/primer-marketing-utilities/package.json
index 0b76b75175..d9c48b1f59 100644
--- a/modules/primer-marketing-utilities/package.json
+++ b/modules/primer-marketing-utilities/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-marketing-utilities",
   "description": "Marketing specific immutable, atomic CSS classes",
   "homepage": "http://primercss.io/",
@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-marketing/package.json b/modules/primer-marketing/package.json
index 0558381cfc..61b1f8cb62 100644
--- a/modules/primer-marketing/package.json
+++ b/modules/primer-marketing/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "5.3.1",
+  "version": "5.4.0",
   "name": "primer-marketing",
   "description": "Primer CSS marketing packages",
   "homepage": "http://primercss.io/",
@@ -25,14 +25,14 @@
     "test": "npm run build"
   },
   "dependencies": {
-    "primer-breadcrumb": "1.3.0",
-    "primer-cards": "0.4.1",
+    "primer-breadcrumb": "1.4.0",
+    "primer-cards": "0.5.0",
     "primer-marketing-support": "1.3.0",
-    "primer-marketing-type": "1.3.0",
-    "primer-marketing-utilities": "1.3.0",
-    "primer-page-headers": "1.3.0",
-    "primer-page-sections": "1.3.0",
-    "primer-support": "4.3.0",
-    "primer-tables": "1.3.0"
+    "primer-marketing-type": "1.4.0",
+    "primer-marketing-utilities": "1.4.0",
+    "primer-page-headers": "1.4.0",
+    "primer-page-sections": "1.4.0",
+    "primer-support": "4.4.0",
+    "primer-tables": "1.4.0"
   }
 }
diff --git a/modules/primer-navigation/package.json b/modules/primer-navigation/package.json
index a8daae3b49..cde14c3388 100644
--- a/modules/primer-navigation/package.json
+++ b/modules/primer-navigation/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-navigation",
   "description": "Singular purpose and flexible navigation elements.",
   "homepage": "http://primercss.io/",
@@ -27,7 +27,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-page-headers/package.json b/modules/primer-page-headers/package.json
index 5fdc1fd58f..2bf62f047e 100644
--- a/modules/primer-page-headers/package.json
+++ b/modules/primer-page-headers/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-page-headers",
   "description": "Jumbotrons, heroes, and featured content sections for marketing websites at GitHub.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "css",
diff --git a/modules/primer-page-sections/package.json b/modules/primer-page-sections/package.json
index 5d3e0d271e..d3f1172d1c 100644
--- a/modules/primer-page-sections/package.json
+++ b/modules/primer-page-sections/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-page-sections",
   "description": "Styles to create distinct sections of marketing pages at GitHub.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "css",
diff --git a/modules/primer-product/package.json b/modules/primer-product/package.json
index 82143b38c4..b9405afe9e 100644
--- a/modules/primer-product/package.json
+++ b/modules/primer-product/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "5.3.1",
+  "version": "5.4.0",
   "name": "primer-product",
   "description": "Primer CSS's product modules",
   "homepage": "http://primercss.io/",
@@ -25,11 +25,11 @@
     "test": "npm run build"
   },
   "dependencies": {
-    "primer-alerts": "1.4.0",
-    "primer-avatars": "1.3.0",
-    "primer-blankslate": "1.3.0",
-    "primer-labels": "1.4.0",
-    "primer-markdown": "3.6.0",
-    "primer-support": "4.3.0"
+    "primer-alerts": "1.5.0",
+    "primer-avatars": "1.4.0",
+    "primer-blankslate": "1.4.0",
+    "primer-labels": "1.5.0",
+    "primer-markdown": "3.7.0",
+    "primer-support": "4.4.0"
   }
 }
diff --git a/modules/primer-support/lib/mixins/buttons.scss b/modules/primer-support/lib/mixins/buttons.scss
index a4f47d3d76..d4fefa75c8 100644
--- a/modules/primer-support/lib/mixins/buttons.scss
+++ b/modules/primer-support/lib/mixins/buttons.scss
@@ -23,7 +23,8 @@
     }
 
     &:active,
-    &.selected {
+    &.selected,
+    [open] > & {
       background-color: darken(desaturate($bg, 10%), 6%);
       background-image: none;
       border-color: rgba($black, 0.35); // repeat to avoid shift on click-drag off of button
@@ -54,7 +55,8 @@
     }
 
     &:active,
-    &.selected {
+    &.selected,
+    [open] > & {
       background-color: darken(mix($bg, $bg2, 50%), 7%);
       background-image: none;
       border-color: $black-fade-50; // repeat to avoid shift on click-drag off of button
@@ -99,7 +101,8 @@
   }
 
   &:active,
-  &.selected {
+  &.selected,
+  [open] > & {
     color: $text-white;
     background-color: darken($color, 5%);
     background-image: none;
@@ -129,7 +132,8 @@
 
   &:hover,
   &:active,
-  &.selected {
+  &.selected,
+  [open] > & {
     color: $bg-color;
     background-color: $text-color;
     background-image: none;
diff --git a/modules/primer-support/package.json b/modules/primer-support/package.json
index 639f6d4688..8d0c4896fe 100644
--- a/modules/primer-support/package.json
+++ b/modules/primer-support/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "4.3.0",
+  "version": "4.4.0",
   "name": "primer-support",
   "description": "Sass variables, mixins, and functions for use in our components.",
   "homepage": "http://primercss.io/",
diff --git a/modules/primer-table-object/package.json b/modules/primer-table-object/package.json
index 43466fba6f..4ec1c80eb4 100644
--- a/modules/primer-table-object/package.json
+++ b/modules/primer-table-object/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-table-object",
   "description": "A module for creating dynamically resizable elements that always sit on the same horizontal line.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
     "test": "npm-run-all -s build lint test-docs"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-tables/package.json b/modules/primer-tables/package.json
index 37a2d2a43a..7474aa03dd 100644
--- a/modules/primer-tables/package.json
+++ b/modules/primer-tables/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-tables",
   "description": "Styles to display tabular data for marketing websites at GitHub.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "primer-marketing-support": "1.3.0",
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "css",
diff --git a/modules/primer-tooltips/package.json b/modules/primer-tooltips/package.json
index e7fc7412b5..e0e22e183d 100644
--- a/modules/primer-tooltips/package.json
+++ b/modules/primer-tooltips/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-tooltips",
   "description": "Add tooltips built entirely in CSS to nearly any element.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
     "test": "npm-run-all -s build lint test-docs"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-truncate/package.json b/modules/primer-truncate/package.json
index 5d813c096b..c3b928886d 100644
--- a/modules/primer-truncate/package.json
+++ b/modules/primer-truncate/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "primer-truncate",
   "description": "Shorten text with an ellipsis.",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
     "test": "npm-run-all -s build lint test-docs"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/modules/primer-utilities/package.json b/modules/primer-utilities/package.json
index 6db4e44260..dc65861ba3 100644
--- a/modules/primer-utilities/package.json
+++ b/modules/primer-utilities/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "4.7.0",
+  "version": "4.8.0",
   "name": "primer-utilities",
   "description": "Immutable, atomic CSS classes to rapidly build product",
   "homepage": "http://primercss.io/",
@@ -28,7 +28,7 @@
     "test": "npm-run-all -s build lint"
   },
   "dependencies": {
-    "primer-support": "4.3.0"
+    "primer-support": "4.4.0"
   },
   "keywords": [
     "primer",
diff --git a/script/bump-rc b/script/bump-rc
new file mode 100755
index 0000000000..d5dca2f2cb
--- /dev/null
+++ b/script/bump-rc
@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e
+
+package="$1"
+npm_tag=rc
+semver=$(npm bin)/semver
+
+bold=$(tput bold)
+normal=$(tput sgr0)
+
+pushd modules/$package > /dev/null
+
+# get the version we're publishing as a release candidate
+local_version=$(jq -r .version package.json)
+echo "Bumping $package@${local_version}"
+if [[ $local_version =~ "-" ]]; then
+  echo "❌ Found pre-release version: $package@$local_version; bailing!"
+  exit 1
+fi
+
+# find the *greatest* published prerelease
+rc_prefix="$local_version-rc"
+rc_version=$(
+  npm info "$package@$npm_tag" --json \
+    | jq -r '.versions[]' \
+    | grep "^${rc_prefix/./\.}" \
+    | tail -1
+)
+# if there isn't one, use the current local version
+if [[ "$rc_version" == "" ]]; then
+  echo "   🤷‍♀️  no published RC; using ${bold}${local_version}${normal}"
+  rc_version="$local_version-rc.0"
+else
+  echo "   📰  published RC: ${bold}${rc_version}${normal}"
+fi
+
+# increment by the tagged prerelease id
+next_version=$(
+  $semver -i prerelease --preid $npm_tag "$rc_version"
+)
+
+bumped=$(npm version --no-git "$next_version")
+echo "   ➡️  ${bold}${bumped}${normal}"
+popd > /dev/null
diff --git a/script/release-candidate b/script/release-candidate
index b6570f21f8..ce7f80b659 100755
--- a/script/release-candidate
+++ b/script/release-candidate
@@ -2,57 +2,16 @@
 set -e
 echo "👌  Publishing release candidate..."
 
-package=primer-css
 npm_tag=rc
 
-# get the version we're publishing as a release candidate
-local_version=$(jq -r .version modules/$package/package.json)
-if [[ $local_version =~ "-" ]]; then
-  echo "❌  Found pre-release version: $package@$local_version; bailing!"
-  exit 1
-else
-  echo "🏔  Local version: $package@$local_version"
-fi
-
-# get the version most recently published to the rc dist-tag
-rc_version=$(npm info $package@$npm_tag version)
-echo "📦  Published version for $package@$npm_tag: $rc_version"
-rc_release=${rc_version%-*}
-if [[ $local_version != $rc_release ]]; then
-  rc_version=$local_version
-fi
-
-# determine the 
-next_version=$(
-  $(npm bin)/semver --increment prerelease --preid $npm_tag $rc_version
-)
-echo "🤜  Next version: $package@$next_version"
-
-# strip the pre-release version, yielding just major.minor.patch
-pre_version=${next_version:${#local_version}}
-echo "   Prerelease suffix: '$pre_version'"
-
 # if this is the same version, we need to bump the prerelease
 # for all of the modules using the same prerelease identifier
 echo "Updating all module versions in place..."
 echo
-module_dirs=modules/primer-*
+module_dirs=modules/*primer*
 for module_dir in $module_dirs; do
-  pushd $module_dir > /dev/null
   module=$(basename $module_dir)
-
-  # determine the local version (in git)
-  module_version=$(jq -r .version package.json)
-  # strip the rc version, just in case
-  module_version=${module_version%-*}
-  module_next_version="$module_version$pre_version"
-
-  echo "$module@$module_version => $module_next_version"
-  # "upgrade" to the most recent RC version so that
-  # `npm version prerelease` can increment automatically
-  npm version --no-git --quiet "$module_next_version"
-
-  popd > /dev/null
+  $(dirname $0)/bump-rc $module
 done
 
 # publish all the things!