diff --git a/deno.jsonc b/deno.jsonc
index 2d1fed1..7db211e 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -8,7 +8,8 @@
     "rules": {
       "exclude": [
         "no-explicit-any",
-        "camelcase"
+        "camelcase",
+        "no-import-prefix"
       ]
     }
   },
diff --git a/deno.lock b/deno.lock
index ecf57bf..8104a47 100644
--- a/deno.lock
+++ b/deno.lock
@@ -6,13 +6,14 @@
     "jsr:@std/assert@1": "1.0.13",
     "jsr:@std/bytes@^1.0.4": "1.0.4",
     "jsr:@std/csv@*": "1.0.6",
+    "jsr:@std/csv@1.0.6": "1.0.6",
     "jsr:@std/fmt@0.221": "0.221.0",
     "jsr:@std/fmt@1": "1.0.8",
     "jsr:@std/fs@1": "1.0.19",
     "jsr:@std/internal@^1.0.1": "1.0.1",
     "jsr:@std/internal@^1.0.6": "1.0.9",
     "jsr:@std/internal@^1.0.9": "1.0.9",
-    "jsr:@std/path@1": "1.0.2",
+    "jsr:@std/path@1": "1.1.1",
     "jsr:@std/path@^1.0.2": "1.0.2",
     "jsr:@std/path@^1.1.1": "1.1.1",
     "jsr:@ts-morph/bootstrap@0.27": "0.27.0",
diff --git a/lib/package_json.test.ts b/lib/package_json.test.ts
index 490ecd0..e4c5be6 100644
--- a/lib/package_json.test.ts
+++ b/lib/package_json.test.ts
@@ -54,6 +54,7 @@ Deno.test("single entrypoint", () => {
   assertEquals(getPackageJson(props), {
     name: "package",
     version: "0.1.0",
+    type: "module",
     main: "./script/mod.js",
     module: "./esm/mod.js",
     types: "./types/mod.d.ts",
@@ -93,6 +94,7 @@ Deno.test("single entrypoint", () => {
     {
       name: "package",
       version: "0.1.0",
+      type: "module",
       main: "./script/mod.js",
       module: "./esm/mod.js",
       types: "./types/mod.d.ts",
@@ -128,6 +130,7 @@ Deno.test("single entrypoint", () => {
     {
       name: "package",
       version: "0.1.0",
+      type: "module",
       main: undefined,
       module: "./esm/mod.js",
       types: "./types/mod.d.ts",
@@ -184,6 +187,7 @@ Deno.test("single entrypoint", () => {
     {
       name: "package",
       version: "0.1.0",
+      type: "module",
       main: undefined,
       module: "./esm/mod.js",
       types: undefined,
@@ -216,6 +220,7 @@ Deno.test("single entrypoint", () => {
     {
       name: "package",
       version: "0.1.0",
+      type: "module",
       main: undefined,
       module: "./esm/mod.js",
       types: undefined,
@@ -324,6 +329,7 @@ Deno.test("multiple entrypoints", () => {
     version: "0.1.0",
     main: "./script/mod.js",
     module: "./esm/mod.js",
+    type: "module",
     types: "./types/mod.d.ts",
     dependencies: {
       "@deno/shim-deno": "~0.1.0",
@@ -401,6 +407,7 @@ Deno.test("binary entrypoints", () => {
     version: "0.1.0",
     main: "./script/mod.js",
     module: "./esm/mod.js",
+    type: "module",
     types: "./types/mod.d.ts",
     bin: {
       my_bin: "./esm/bin.js",
@@ -501,6 +508,7 @@ Deno.test("peer dependencies", () => {
         scripts: {
           test: "node test_runner.js",
         },
+        type: "module",
         dependencies: {
           dep: "^1.0.0",
         },
diff --git a/lib/package_json.ts b/lib/package_json.ts
index ecdc31d..2156bf5 100644
--- a/lib/package_json.ts
+++ b/lib/package_json.ts
@@ -35,6 +35,14 @@ export function getPackageJson({
       path: e.replace(/\.tsx?$/i, ".js"),
       types: e.replace(/\.tsx?$/i, ".d.ts"),
     }));
+  // include "type" field if we are including esm
+  const type = {
+    ...(includeEsModule
+      ? {
+        type: "module",
+      }
+      : {}),
+  };
   const exports = finalEntryPoints.filter((e) => e.kind === "export");
   const binaries = finalEntryPoints.filter((e) => e.kind === "bin");
   const dependencies = {
@@ -111,6 +119,7 @@ export function getPackageJson({
   const final: Record<string, unknown> = {
     ...mainExport,
     ...binaryExport,
+    ...type,
     ...packageJsonObj,
     scripts: {},
     ...deleteEmptyKeys({
diff --git a/lib/test_runner/get_test_runner_code.test.ts b/lib/test_runner/get_test_runner_code.test.ts
index 626ce5f..bd790b8 100644
--- a/lib/test_runner/get_test_runner_code.test.ts
+++ b/lib/test_runner/get_test_runner_code.test.ts
@@ -16,7 +16,10 @@ Deno.test("gets code when no shim used", () => {
   });
   assertEquals(
     code,
-    `const pc = require("picocolors");
+    `import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+const __dirname = new URL(".", import.meta.url).pathname;
+const pc = require("picocolors");
 const process = require("process");
 
 const filePaths = [
@@ -60,7 +63,10 @@ Deno.test("gets code when shim used", () => {
   });
   assertEquals(
     code,
-    `const pc = require("picocolors");
+    `import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+const __dirname = new URL(".", import.meta.url).pathname;
+const pc = require("picocolors");
 const process = require("process");
 const { pathToFileURL } = require("url");
 const { testDefinitions } = require("test-shim-package/test-internals");
@@ -123,7 +129,10 @@ Deno.test("gets code when cjs is not used", () => {
   });
   assertEquals(
     code,
-    `const pc = require("picocolors");
+    `import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+const __dirname = new URL(".", import.meta.url).pathname;
+const pc = require("picocolors");
 const process = require("process");
 
 const filePaths = [
diff --git a/lib/test_runner/get_test_runner_code.ts b/lib/test_runner/get_test_runner_code.ts
index dfb9c6c..8215d16 100644
--- a/lib/test_runner/get_test_runner_code.ts
+++ b/lib/test_runner/get_test_runner_code.ts
@@ -11,6 +11,16 @@ export function getTestRunnerCode(options: {
 }) {
   const usesDenoTest = options.denoTestShimPackageName != null;
   const writer = createWriter();
+
+  if (options.includeEsModule) {
+    // ensure compatibility with esm ("type": "module")
+    writer.writeLine(`import { createRequire } from 'module';`);
+    writer.writeLine(`const require = createRequire(import.meta.url);`);
+    writer.writeLine(
+      `const __dirname = new URL(".", import.meta.url).pathname;`,
+    );
+  }
+
   writer.writeLine(`const pc = require("picocolors");`)
     .writeLine(`const process = require("process");`);
   if (usesDenoTest) {
diff --git a/tests/integration.test.ts b/tests/integration.test.ts
index f6a8668..14c1cf9 100644
--- a/tests/integration.test.ts
+++ b/tests/integration.test.ts
@@ -63,6 +63,7 @@ Deno.test("should build test project - basic", async () => {
     assertEquals(output.packageJson, {
       name: "add",
       version: "1.0.0",
+      type: "module",
       main: "./script/mod.js",
       module: "./esm/mod.js",
       exports: {
@@ -211,6 +212,7 @@ Deno.test("should build with all options off", async () => {
     assertEquals(output.packageJson, {
       name: "add",
       version: "1.0.0",
+      type: "module",
       module: "./esm/mod.js",
       exports: {
         ".": {
@@ -288,6 +290,7 @@ Deno.test("should build test project with declarations inline by default", async
       assertEquals(output.packageJson, {
         name: "add",
         version: "1.0.0",
+        type: "module",
         main: "./script/mod.js",
         module: "./esm/mod.js",
         exports: {
@@ -369,6 +372,7 @@ Deno.test("should build bin project", async () => {
     assertEquals(output.packageJson, {
       name: "add",
       version: "1.0.0",
+      type: "module",
       bin: {
         add: "./esm/mod.js",
       },
@@ -414,6 +418,7 @@ Deno.test("should build bin project with a shebang", async () => {
     assertEquals(output.packageJson, {
       name: "hello",
       version: "1.0.0",
+      type: "module",
       bin: {
         hello: "./esm/main.js",
       },
@@ -505,6 +510,7 @@ Deno.test("not error for TLA when not using CommonJS", async () => {
     assertEquals(output.packageJson, {
       name: "add",
       version: "1.0.0",
+      type: "module",
       module: "./esm/mod.js",
       exports: {
         ".": {
@@ -621,6 +627,7 @@ Deno.test("should build with package mappings", async () => {
     assertEquals(output.packageJson, {
       name: "mappings",
       version: "1.2.3",
+      type: "module",
       main: "./script/mod.js",
       module: "./esm/mod.js",
       exports: {
@@ -690,6 +697,7 @@ Deno.test("should build with peer dependencies in mappings", async () => {
     assertEquals(output.packageJson, {
       name: "mappings",
       version: "1.2.3",
+      type: "module",
       main: "./script/mod.js",
       module: "./esm/mod.js",
       exports: {
@@ -1162,6 +1170,7 @@ Deno.test("should build jsr project", async () => {
     assertEquals(output.packageJson, {
       name: "add",
       version: "1.0.0",
+      type: "module",
       main: "./script/mod.js",
       module: "./esm/mod.js",
       exports: {
@@ -1232,6 +1241,7 @@ Deno.test("should build workspace project", async () => {
       assertEquals(output.packageJson, {
         name: "add",
         version: "1.0.0",
+        type: "module",
         main: "./script/mod.js",
         module: "./esm/mod.js",
         exports: {
diff --git a/tests/jsr_project/mod.ts b/tests/jsr_project/mod.ts
index 4fa865a..ab36001 100644
--- a/tests/jsr_project/mod.ts
+++ b/tests/jsr_project/mod.ts
@@ -1,6 +1,6 @@
 // Copyright 2018-2024 the Deno authors. MIT license.
 
-import { parse } from "jsr:@std/csv/parse";
+import { parse } from "jsr:@std/csv@1.0.6/parse";
 import { assertEquals } from "jsr:@std/assert@0.221/assert-equals";
 import * as fs from "node:fs";