diff --git a/functions/helloworld/index.js b/functions/helloworld/index.js
index 978ab21a4d..e7dd86fff9 100644
--- a/functions/helloworld/index.js
+++ b/functions/helloworld/index.js
@@ -96,12 +96,15 @@ exports.helloPubSub = function (event, callback) {
  */
 exports.helloGCS = function (event, callback) {
   const file = event.data;
-  const isDelete = file.resourceState === 'not_exists';
 
-  if (isDelete) {
+  if (file.resourceState === 'not_exists') {
     console.log(`File ${file.name} deleted.`);
-  } else {
+  } else if (file.metageneration === 1) {
+    // metageneration attribute is updated on metadata changes.
+    // on create value is 1
     console.log(`File ${file.name} uploaded.`);
+  } else {
+    console.log(`File ${file.name} metadata updated.`);
   }
 
   callback();
diff --git a/functions/helloworld/package.json b/functions/helloworld/package.json
index c27e869b16..3208d423db 100644
--- a/functions/helloworld/package.json
+++ b/functions/helloworld/package.json
@@ -18,14 +18,14 @@
   },
   "dependencies": {
     "@google-cloud/debug-agent": "1.0.0",
-    "pug": "2.0.0-beta.12",
+    "pug": "2.0.0-rc.1",
     "safe-buffer": "5.0.1"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "1.4.7",
+    "@google-cloud/nodejs-repo-tools": "1.4.12",
     "ava": "0.19.1",
     "proxyquire": "1.7.11",
-    "sinon": "2.1.0"
+    "sinon": "2.2.0"
   },
   "cloud-repo-tools": {
     "requiresKeyFile": true,
diff --git a/functions/helloworld/test/index.test.js b/functions/helloworld/test/index.test.js
index 653913a56f..4812fb7928 100644
--- a/functions/helloworld/test/index.test.js
+++ b/functions/helloworld/test/index.test.js
@@ -142,7 +142,26 @@ test.serial(`helloGCS: should print uploaded message`, (t) => {
   program.helloGCS({
     data: {
       name: `foo`,
-      resourceState: `exists`
+      resourceState: `exists`,
+      metageneration: 1
+    }
+  }, callback);
+
+  t.deepEqual(console.log.callCount, 1);
+  t.deepEqual(console.log.firstCall.args, [expectedMsg]);
+  t.deepEqual(callback.callCount, 1);
+  t.deepEqual(callback.firstCall.args, []);
+});
+
+test.serial(`helloGCS: should print metadata updated message`, (t) => {
+  const expectedMsg = `File foo metadata updated.`;
+  const callback = sinon.stub();
+
+  program.helloGCS({
+    data: {
+      name: `foo`,
+      resourceState: `exists`,
+      metageneration: 2
     }
   }, callback);
 
diff --git a/functions/helloworld/yarn.lock b/functions/helloworld/yarn.lock
index ce0c241944..8296512fa4 100644
--- a/functions/helloworld/yarn.lock
+++ b/functions/helloworld/yarn.lock
@@ -76,9 +76,9 @@
     source-map "^0.5.1"
     split "^1.0.0"
 
-"@google-cloud/nodejs-repo-tools@1.4.7":
-  version "1.4.7"
-  resolved "https://registry.yarnpkg.com/@google-cloud/nodejs-repo-tools/-/nodejs-repo-tools-1.4.7.tgz#1e3838af75386d99317f892ff1288e217a4a4b11"
+"@google-cloud/nodejs-repo-tools@1.4.12":
+  version "1.4.12"
+  resolved "https://registry.yarnpkg.com/@google-cloud/nodejs-repo-tools/-/nodejs-repo-tools-1.4.12.tgz#41b9dc143daeb0e2714e884a7f56fd0730159735"
   dependencies:
     ava "0.19.1"
     colors "1.1.2"
@@ -2728,9 +2728,9 @@ pug-lexer@^3.1.0:
     is-expression "^3.0.0"
     pug-error "^1.3.2"
 
-pug-linker@^2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/pug-linker/-/pug-linker-2.0.3.tgz#b331ffa25737dde69c127b56c10ff17fae766dca"
+pug-linker@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pug-linker/-/pug-linker-3.0.0.tgz#2416f06aaa1a9720e3b3261d1e8ca72f6f5123d2"
   dependencies:
     pug-error "^1.3.2"
     pug-walk "^1.1.2"
@@ -2763,14 +2763,14 @@ pug-walk@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/pug-walk/-/pug-walk-1.1.2.tgz#debb24c070a95d5fc2aebf3589261833d2332e3b"
 
-pug@2.0.0-beta.12:
-  version "2.0.0-beta.12"
-  resolved "https://registry.yarnpkg.com/pug/-/pug-2.0.0-beta.12.tgz#493037cbfbd97817ce0a4b3190f341cd556874bc"
+pug@2.0.0-rc.1:
+  version "2.0.0-rc.1"
+  resolved "https://registry.yarnpkg.com/pug/-/pug-2.0.0-rc.1.tgz#723c08b3349bb9b96865b9ed7d3e379e247cd984"
   dependencies:
     pug-code-gen "^1.1.1"
     pug-filters "^2.1.2"
     pug-lexer "^3.1.0"
-    pug-linker "^2.0.3"
+    pug-linker "^3.0.0"
     pug-load "^2.0.6"
     pug-parser "^2.0.2"
     pug-runtime "^2.0.3"
@@ -3079,6 +3079,19 @@ sinon@2.1.0:
     text-encoding "0.6.4"
     type-detect "^4.0.0"
 
+sinon@2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/sinon/-/sinon-2.2.0.tgz#3b1b42ff5defcbf51a52a62aca6d61171b9fd262"
+  dependencies:
+    diff "^3.1.0"
+    formatio "1.2.0"
+    lolex "^1.6.0"
+    native-promise-only "^0.8.1"
+    path-to-regexp "^1.7.0"
+    samsam "^1.1.3"
+    text-encoding "0.6.4"
+    type-detect "^4.0.0"
+
 slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
@@ -3519,14 +3532,10 @@ with@^5.0.0:
     acorn "^3.1.0"
     acorn-globals "^3.0.0"
 
-wordwrap@0.0.2:
+wordwrap@0.0.2, wordwrap@~0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.2.tgz#b79669bb42ecb409f83d583cad52ca17eaa1643f"
 
-wordwrap@~0.0.2:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
-
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"