diff --git a/package.json b/package.json
index 559492a07..4409774bb 100644
--- a/package.json
+++ b/package.json
@@ -81,7 +81,7 @@
     "lodash.snakecase": "^4.1.1",
     "merge-stream": "^2.0.0",
     "p-queue": "^6.0.2",
-    "protobufjs": "^7.4.0",
+    "protobufjs": "^8.0.0",
     "retry-request": "^8.0.0",
     "split-array-stream": "^2.0.0",
     "stack-trace": "0.0.10",
diff --git a/samples/package.json b/samples/package.json
index b1d936ffd..e2e0c0356 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -18,7 +18,7 @@
     "@google-cloud/kms": "^5.0.0",
     "@google-cloud/precise-date": "^5.0.0",
     "@google-cloud/spanner": "^8.4.0",
-    "protobufjs": "^7.0.0",
+    "protobufjs": "^8.0.0",
     "yargs": "^17.0.0"
   },
   "devDependencies": {