diff --git a/package.json b/package.json
index 973a85c31..273215eba 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "eslint-plugin-prettier": "^5.1.2",
     "lerna": "^3.19.0",
     "prettier": "3.0.3",
-    "typescript": "^4.0.3"
+    "typescript": "^5.4.5"
   },
   "prettier": {
     "semi": false,
diff --git a/packages/pg-cloudflare/package.json b/packages/pg-cloudflare/package.json
index bafd59934..5bb055cba 100644
--- a/packages/pg-cloudflare/package.json
+++ b/packages/pg-cloudflare/package.json
@@ -7,7 +7,7 @@
   "license": "MIT",
   "devDependencies": {
     "ts-node": "^8.5.4",
-    "typescript": "^4.0.3"
+    "typescript": "^5.4.5"
   },
   "exports": {
     "workerd": "./dist/index.js",
diff --git a/packages/pg-protocol/package.json b/packages/pg-protocol/package.json
index 962af3136..8fd6f111a 100644
--- a/packages/pg-protocol/package.json
+++ b/packages/pg-protocol/package.json
@@ -13,7 +13,7 @@
     "chunky": "^0.0.0",
     "mocha": "^7.1.2",
     "ts-node": "^8.5.4",
-    "typescript": "^4.0.3"
+    "typescript": "^5.4.5"
   },
   "scripts": {
     "test": "mocha dist/**/*.test.js",
diff --git a/packages/pg-query-stream/package.json b/packages/pg-query-stream/package.json
index 73f7992a9..f2a02ce59 100644
--- a/packages/pg-query-stream/package.json
+++ b/packages/pg-query-stream/package.json
@@ -40,7 +40,7 @@
     "pg": "^8.11.5",
     "stream-spec": "~0.3.5",
     "ts-node": "^8.5.4",
-    "typescript": "^4.0.3"
+    "typescript": "^5.4.5"
   },
   "peerDependencies": {
     "pg": "^8"
diff --git a/packages/pg/package.json b/packages/pg/package.json
index b910700d9..ddd1efc25 100644
--- a/packages/pg/package.json
+++ b/packages/pg/package.json
@@ -32,7 +32,7 @@
     "bluebird": "3.5.2",
     "co": "4.6.0",
     "pg-copy-streams": "0.3.0",
-    "typescript": "^4.0.3",
+    "typescript": "^5.4.5",
     "workerd": "^1.20230419.0",
     "wrangler": "^2.16.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 6e8be6e33..c1a413de2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6887,10 +6887,10 @@ typedarray@^0.0.6:
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.0.3:
-  version "4.8.4"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-4.8.4.tgz"
-  integrity sha512-QCh+85mCy+h0IGff8r5XWzOVSbBO+KfeYrMQh7NJ58QujwcE22u+NUSmUxqF+un70P9GXKxa2HCNiTTMJknyjQ==
+typescript@^5.4.5:
+  version "5.4.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.4.5.tgz#42ccef2c571fdbd0f6718b1d1f5e6e5ef006f611"
+  integrity sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==
 
 uglify-js@^3.1.4:
   version "3.13.5"