diff --git a/package.json b/package.json
index 27ed2f743..24a28cc78 100644
--- a/package.json
+++ b/package.json
@@ -108,7 +108,7 @@
     "dedent": "^1.0.0",
     "execa": "^5.0.0",
     "gapic-tools": "^0.4.0",
-    "gts": "^5.0.0",
+    "gts": "^6.0.0",
     "jsdoc": "^4.0.0",
     "jsdoc-fresh": "^3.0.0",
     "jsdoc-region-tag": "^3.0.0",
diff --git a/system-test/fixtures/sample/package.json b/system-test/fixtures/sample/package.json
index 27a17bf19..55bbaf5fd 100644
--- a/system-test/fixtures/sample/package.json
+++ b/system-test/fixtures/sample/package.json
@@ -18,6 +18,6 @@
   "devDependencies": {
     "@types/node": "^20.0.0",
     "typescript": "^4.0.0",
-    "gts": "^3.0.0"
+    "gts": "^6.0.0"
   }
 }