diff --git a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
index 7cd9bd0..56836c2 100644
--- a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
+++ b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
       os (>= 0.9, < 2.0)
       signet (~> 0.7)
     httpclient (2.8.3)
-    json (2.1.0)
+    json (2.3.0)
     jwt (2.1.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)