diff --git a/extensions/package.json b/extensions/package.json
index 5577dde9099..3307d7709cb 100644
--- a/extensions/package.json
+++ b/extensions/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Dependencies shared by all extensions",
   "dependencies": {
-    "typescript": "^4.0.1-rc"
+    "typescript": "^4.0.1-insiders.20200813"
   },
   "scripts": {
     "postinstall": "node ./postinstall"
diff --git a/extensions/yarn.lock b/extensions/yarn.lock
index 9e459157c1b..9a140984799 100644
--- a/extensions/yarn.lock
+++ b/extensions/yarn.lock
@@ -2,7 +2,7 @@
 # yarn lockfile v1
 
 
-typescript@^4.0.1-rc:
-  version "4.0.1-rc"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.1-rc.tgz#8adc78223eae56fe71d906a5fa90c3543b07a677"
-  integrity sha512-TCkspT3dSKOykbzS3/WSK7pqU2h1d/lEO6i45Afm5Y3XNAEAo8YXTG3kHOQk/wFq/5uPyO1+X8rb/Q+g7UsxJw==
+typescript@^4.0.1-insiders.20200813:
+  version "4.0.1-insiders.20200813"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.1-insiders.20200813.tgz#0b17335a7517023be0f1ce947052662ab2bde1f0"
+  integrity sha512-mTQPs9uyxv6jLEO5Z+LJpFUSQwx9KI3ZD+2Uv9e5O32Oz/16snCB5skBHw5k1PchsXOZCG6xcB902qmgjI0tWQ==