diff --git a/packages/dev-frontend/package.json b/packages/dev-frontend/package.json
index 96b315c6..a72b6f7b 100644
--- a/packages/dev-frontend/package.json
+++ b/packages/dev-frontend/package.json
@@ -39,7 +39,7 @@
     "react-scripts": "4.0.3",
     "source-map-explorer": "2.5.2",
     "theme-ui": "0.6.0-canary.1544.5359f8a1e408a4dfeb74a9ae39688270286e534a.0",
-    "typescript": "4.1.5"
+    "typescript": "4.9.5"
   },
   "scripts": {
     "analyze": "source-map-explorer 'build/static/js/*.js'",
diff --git a/packages/fuzzer/package.json b/packages/fuzzer/package.json
index 2b7ca864..4d904e42 100644
--- a/packages/fuzzer/package.json
+++ b/packages/fuzzer/package.json
@@ -11,7 +11,7 @@
     "dotenv": "^8.2.0",
     "ethers": "^5.0.0",
     "ts-node": "^9.0.0",
-    "typescript": "~4.1.0",
+    "typescript": "~4.9.5",
     "yargs": "^16.0.3"
   }
 }
diff --git a/packages/lib-base/package.json b/packages/lib-base/package.json
index a22c5f22..26e9015a 100644
--- a/packages/lib-base/package.json
+++ b/packages/lib-base/package.json
@@ -35,6 +35,6 @@
     "mocha": "8.3.2",
     "npm-run-all": "4.1.5",
     "ts-node": "9.1.1",
-    "typescript": "4.1.5"
+    "typescript": "4.9.5"
   }
 }
diff --git a/packages/lib-ethers/package.json b/packages/lib-ethers/package.json
index ff2c2477..d26d26c6 100644
--- a/packages/lib-ethers/package.json
+++ b/packages/lib-ethers/package.json
@@ -61,6 +61,6 @@
     "hardhat": "2.1.1",
     "npm-run-all": "4.1.5",
     "ts-node": "9.1.1",
-    "typescript": "4.1.5"
+    "typescript": "4.9.5"
   }
 }
diff --git a/packages/lib-react/package.json b/packages/lib-react/package.json
index 5dc753cd..60b0cf9f 100644
--- a/packages/lib-react/package.json
+++ b/packages/lib-react/package.json
@@ -24,6 +24,6 @@
     "eslint-plugin-react-hooks": "4.2.0",
     "npm-run-all": "4.1.5",
     "react": "17.0.1",
-    "typescript": "4.1.5"
+    "typescript": "4.9.5"
   }
 }
diff --git a/packages/providers/package.json b/packages/providers/package.json
index a4e733bd..fdff9dfb 100644
--- a/packages/providers/package.json
+++ b/packages/providers/package.json
@@ -10,7 +10,7 @@
   "devDependencies": {
     "ethers": "^5.0.0",
     "ts-node": "^9.1.1",
-    "typescript": "~4.1.0"
+    "typescript": "~4.9.5"
   },
   "peerDependencies": {
     "ethers": "^5.0.0"
diff --git a/yarn.lock b/yarn.lock
index 6e1b57bf..74970985 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -17784,7 +17784,12 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@4.1.5, typescript@~4.1.0, typescript@~4.1.3:
+typescript@4.9.5, typescript@~4.9.5:
+  version "4.9.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"
+  integrity sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==
+
+typescript@~4.1.3:
   version "4.1.5"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.5.tgz#123a3b214aaff3be32926f0d8f1f6e704eb89a72"
   integrity sha512-6OSu9PTIzmn9TCDiovULTnET6BgXtDYL4Gg4szY+cGsc3JP1dQL8qvE8kShTRx1NIw4Q9IBHlwODjkjWEtMUyA==