diff --git a/src/nerdbank-streams/package.json b/src/nerdbank-streams/package.json
index 1ce2ae52..8822bc8c 100644
--- a/src/nerdbank-streams/package.json
+++ b/src/nerdbank-streams/package.json
@@ -32,7 +32,7 @@
     "watch": "node ./node_modules/typescript/bin/tsc -p tsconfig.json -w"
   },
   "devDependencies": {
-    "@types/gulp": "4.0.17",
+    "@types/gulp": "4.0.18",
     "@types/jest": "30.0.0",
     "@types/msgpack-lite": "0.1.12",
     "@types/node": "16.18.126",
diff --git a/src/nerdbank-streams/yarn.lock b/src/nerdbank-streams/yarn.lock
index 0600e5d6..004abe1b 100644
--- a/src/nerdbank-streams/yarn.lock
+++ b/src/nerdbank-streams/yarn.lock
@@ -1125,10 +1125,10 @@
     "@types/picomatch" "*"
     "@types/streamx" "*"
 
-"@types/gulp@4.0.17":
-  version "4.0.17"
-  resolved "https://registry.yarnpkg.com/@types/gulp/-/gulp-4.0.17.tgz#b314c3762d08d8d69b7c0b86f78d069bafd65009"
-  integrity sha512-+pKQynu2C/HS16kgmDlAicjtFYP8kaa86eE9P0Ae7GB5W29we/E2TIdbOWtEZD5XkpY+jr8fyqfwO6SWZecLpQ==
+"@types/gulp@4.0.18":
+  version "4.0.18"
+  resolved "https://registry.yarnpkg.com/@types/gulp/-/gulp-4.0.18.tgz#2dd43f432452f10412ef2479d44e4d4f0c8f53f6"
+  integrity sha512-IqkYa4sXkwH2uwqO2aXYOoAisJpLX13BPaS6lmEAoG4BbgOay3qqGQFsT9LMSSQVMQlEKU7wTUW0sPV46V0olw==
   dependencies:
     "@types/node" "*"
     "@types/undertaker" ">=1.2.6"