diff --git a/ghost/adapter-manager/package.json b/ghost/adapter-manager/package.json
index 21c91d0d72..6b215aabb9 100644
--- a/ghost/adapter-manager/package.json
+++ b/ghost/adapter-manager/package.json
@@ -27,7 +27,7 @@
     "mocha": "8.1.1",
     "should": "13.2.3",
     "sinon": "9.0.3",
-    "typescript": "3.9.7"
+    "typescript": "4.0.2"
   },
   "dependencies": {
     "@tryghost/errors": "^0.2.3"
diff --git a/ghost/moleculer-service-from-class/package.json b/ghost/moleculer-service-from-class/package.json
index caf71fd9ad..8cf43c5117 100644
--- a/ghost/moleculer-service-from-class/package.json
+++ b/ghost/moleculer-service-from-class/package.json
@@ -24,7 +24,7 @@
     "mocha": "8.1.1",
     "should": "13.2.3",
     "sinon": "9.0.3",
-    "typescript": "3.9.7"
+    "typescript": "4.0.2"
   },
   "dependencies": {
     "moleculer": "0.14.9"
diff --git a/ghost/mw-session-from-token/package.json b/ghost/mw-session-from-token/package.json
index d5c6e5eff8..a7662e6362 100644
--- a/ghost/mw-session-from-token/package.json
+++ b/ghost/mw-session-from-token/package.json
@@ -27,6 +27,6 @@
     "mocha": "8.1.1",
     "should": "13.2.3",
     "sinon": "9.0.3",
-    "typescript": "3.9.7"
+    "typescript": "4.0.2"
   }
 }
diff --git a/ghost/session-service/package.json b/ghost/session-service/package.json
index da908cc4b1..a1a420d257 100644
--- a/ghost/session-service/package.json
+++ b/ghost/session-service/package.json
@@ -28,7 +28,7 @@
     "mocha": "8.1.1",
     "should": "13.2.3",
     "sinon": "9.0.3",
-    "typescript": "3.9.7"
+    "typescript": "4.0.2"
   },
   "dependencies": {
     "@tryghost/errors": "^0.2.3"