diff --git a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
index 7cd9bd0..3a9415a 100644
--- a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
+++ b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     concurrent-ruby (1.1.4)
     daemons (1.3.1)
     declarative (0.0.10)
@@ -58,7 +58,7 @@ GEM
     mustermann (1.0.3)
     mysql2 (0.5.2)
     os (1.0.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     raabro (1.1.6)
     rack (2.0.6)
     rack-protection (2.0.5)