diff --git a/.github/scripts/package.json b/.github/scripts/package.json
index 2c2e5207d..729bda5a0 100644
--- a/.github/scripts/package.json
+++ b/.github/scripts/package.json
@@ -16,6 +16,6 @@
     "devDependencies": {
         "@octokit/rest": "^19.0.0",
         "mocha": "^10.0.0",
-        "sinon": "^18.0.0"
+        "sinon": "^20.0.0"
     }
 }
\ No newline at end of file
diff --git a/samples/package.json b/samples/package.json
index 863f02dc0..11d3235ba 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@google-cloud/datastore": "^9.2.1",
-    "sinon": "^18.0.0"
+    "sinon": "^20.0.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",