diff --git a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
index 7cd9bd0..3f8fd48 100644
--- a/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
+++ b/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/Gemfile.lock
@@ -55,13 +55,14 @@ GEM
     mime-types-data (3.2018.0812)
     multi_json (1.13.1)
     multipart-post (2.0.0)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     mysql2 (0.5.2)
     os (1.0.0)
     public_suffix (3.0.3)
     raabro (1.1.6)
-    rack (2.0.6)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (12.3.2)
     rb-fsevent (0.10.3)
@@ -74,6 +75,7 @@ GEM
     rerun (0.13.0)
       listen (~> 3.0)
     retriable (3.1.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     rufus-scheduler (3.5.2)
       fugit (~> 1.1, >= 1.1.5)
@@ -82,16 +84,16 @@ GEM
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)
       multi_json (~> 1.10)
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tzinfo (2.0.0)
       concurrent-ruby (~> 1.0)
     uber (0.1.0)