diff --git a/advanced/package.json b/advanced/package.json
index a8a6607c..b57124b7 100644
--- a/advanced/package.json
+++ b/advanced/package.json
@@ -18,6 +18,6 @@
     "prisma": "1.34.12",
     "rimraf": "2.7.1",
     "ts-node": "7.0.1",
-    "typescript": "3.9.8"
+    "typescript": "3.9.9"
   }
 }
diff --git a/advanced/yarn.lock b/advanced/yarn.lock
index c5c18c91..3f5dfdd1 100644
--- a/advanced/yarn.lock
+++ b/advanced/yarn.lock
@@ -2141,10 +2141,10 @@ type-is@~1.6.16:
     media-typer "0.3.0"
     mime-types "~2.1.18"
 
-typescript@3.9.8:
-  version "3.9.8"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.8.tgz#7d937ba4e4044af7fa83d127b982f8f61ca816a4"
-  integrity sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==
+typescript@3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
+  integrity sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==
 
 undefsafe@^2.0.2:
   version "2.0.2"
diff --git a/basic/package.json b/basic/package.json
index 0d23abef..10362e60 100644
--- a/basic/package.json
+++ b/basic/package.json
@@ -10,6 +10,6 @@
   "devDependencies": {
     "prisma": "1.34.12",
     "ts-node": "7.0.1",
-    "typescript": "3.9.8"
+    "typescript": "3.9.9"
   }
 }
diff --git a/basic/yarn.lock b/basic/yarn.lock
index 45e1697d..c5a1d0b6 100644
--- a/basic/yarn.lock
+++ b/basic/yarn.lock
@@ -1037,10 +1037,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@3.9.8:
-  version "3.9.8"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.8.tgz#7d937ba4e4044af7fa83d127b982f8f61ca816a4"
-  integrity sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==
+typescript@3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
+  integrity sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==
 
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
diff --git a/minimal/package.json b/minimal/package.json
index 910ac438..eef1f375 100644
--- a/minimal/package.json
+++ b/minimal/package.json
@@ -18,6 +18,6 @@
     "graphql-cli": "2.17.0",
     "npm-run-all": "4.1.5",
     "ts-node": "6.2.0",
-    "typescript": "3.9.8"
+    "typescript": "3.9.9"
   }
 }
diff --git a/minimal/yarn.lock b/minimal/yarn.lock
index 405abb4e..2e2ddb2c 100644
--- a/minimal/yarn.lock
+++ b/minimal/yarn.lock
@@ -2962,10 +2962,10 @@ type-is@^1.6.16, type-is@~1.6.15, type-is@~1.6.16:
     media-typer "0.3.0"
     mime-types "~2.1.18"
 
-typescript@3.9.8:
-  version "3.9.8"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.8.tgz#7d937ba4e4044af7fa83d127b982f8f61ca816a4"
-  integrity sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==
+typescript@3.9.9:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
+  integrity sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==
 
 unique-string@^1.0.0:
   version "1.0.0"