diff --git a/package.json b/package.json
index e6c4dd25..22317d43 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "precompile": "gts clean"
   },
   "dependencies": {
-    "@google-cloud/common": "^3.0.0",
+    "@google-cloud/common": "^3.1.0",
     "@google-cloud/paginator": "^3.0.0",
     "@google-cloud/promisify": "^2.0.0",
     "arrify": "^2.0.1",
diff --git a/src/bigquery.ts b/src/bigquery.ts
index 57f4d837..21b5434d 100644
--- a/src/bigquery.ts
+++ b/src/bigquery.ts
@@ -163,6 +163,7 @@ export interface BigQueryOptions extends common.GoogleAuthOptions {
   autoRetry?: boolean;
   maxRetries?: number;
   location?: string;
+  userAgent?: string;
   /**
    * The API endpoint of the service used to make requests.
    * Defaults to `bigquery.googleapis.com`.
@@ -199,6 +200,8 @@ export interface BigQueryOptions extends common.GoogleAuthOptions {
  *     native Promises.
  * @property {string} [location] The geographic location of all datasets and
  *     jobs referenced and created through the client.
+ * @property {string} [userAgent] The value to be prepended to the User-Agent
+ *     header in API requests.
  * @property {string[]} [scopes] Additional OAuth scopes to use in requests. For
  *     example, to access an external data source, you may need the
  *     `https://www.googleapis.com/auth/drive.readonly` scope.