diff --git a/07_BasicExpress/package.json b/07_BasicExpress/package.json
index ed6dd4e..6e75330 100644
--- a/07_BasicExpress/package.json
+++ b/07_BasicExpress/package.json
@@ -8,7 +8,7 @@
     "email": ""
   },
   "dependencies": {
-    "express": "4.16.0",
+    "express": "4.20.0",
     "jade": "*",
     "stylus": "*",
     "snyk": "^1.99.0"
diff --git a/08_ExpressREST/package.json b/08_ExpressREST/package.json
index 7a13ac8..29c70aa 100644
--- a/08_ExpressREST/package.json
+++ b/08_ExpressREST/package.json
@@ -8,7 +8,7 @@
     "email": ""
   },
   "dependencies": {
-    "express": "3.4.4",
+    "express": "4.20.0",
     "jade": "*",
     "stylus": "*"
   }
diff --git a/11_ExpressMultiple/package.json b/11_ExpressMultiple/package.json
index 19ceb75..05320ef 100644
--- a/11_ExpressMultiple/package.json
+++ b/11_ExpressMultiple/package.json
@@ -9,7 +9,7 @@
     "body-parser": "~1.13.2",
     "cookie-parser": "~1.3.5",
     "debug": "~2.2.0",
-    "express": "~4.13.1",
+    "express": "~4.20.0",
     "jade": "~1.11.0",
     "morgan": "~1.6.1",
     "serve-favicon": "~2.3.0"
diff --git a/12_AdvancedRESTAPI/package.json b/12_AdvancedRESTAPI/package.json
index 6694bbe..233a783 100644
--- a/12_AdvancedRESTAPI/package.json
+++ b/12_AdvancedRESTAPI/package.json
@@ -9,7 +9,7 @@
     "body-parser": "~1.13.2",
     "cookie-parser": "~1.3.5",
     "debug": "~2.2.0",
-    "express": "~4.13.1",
+    "express": "~4.20.0",
     "jade": "~1.11.0",
     "morgan": "~1.6.1",
     "serve-favicon": "~2.3.0"
diff --git a/14_AdvancedJade/package.json b/14_AdvancedJade/package.json
index 1a67384..76537d4 100644
--- a/14_AdvancedJade/package.json
+++ b/14_AdvancedJade/package.json
@@ -9,7 +9,7 @@
     "body-parser": "~1.13.2",
     "cookie-parser": "~1.3.5",
     "debug": "~2.2.0",
-    "express": "~4.13.1",
+    "express": "~4.20.0",
     "jade": "~1.11.0",
     "morgan": "~1.6.1",
     "serve-favicon": "~2.3.0"
diff --git a/package.json b/package.json
index c46497d..5d97ad6 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "body-parser": "~1.13.2",
     "cookie-parser": "~1.3.5",
     "debug": "~2.2.0",
-    "express": "~4.13.1",
+    "express": "~4.20.0",
     "jade": "~1.11.0",
     "morgan": "~1.6.1",
     "serve-favicon": "~2.3.0"