diff --git a/gax/package.json b/gax/package.json
index 2f456c470..67a357100 100644
--- a/gax/package.json
+++ b/gax/package.json
@@ -53,7 +53,7 @@
     "rimraf": "^5.0.1",
     "sinon": "^18.0.0",
     "stream-events": "^1.0.4",
-    "ts-loader": "^8.0.0",
+    "ts-loader": "^9.0.0",
     "typescript": "^5.1.6",
     "uglify-js": "^3.17.0",
     "walkdir": "^0.4.0",