diff --git a/images/webapp/app/Gemfile.lock b/images/webapp/app/Gemfile.lock
index 76abf9b..2cf3970 100644
--- a/images/webapp/app/Gemfile.lock
+++ b/images/webapp/app/Gemfile.lock
@@ -4,21 +4,23 @@ GEM
     daemons (1.3.1)
     eventmachine (1.2.7)
     hiredis (0.6.3)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     rack (2.2.3)
-    rack-protection (2.0.7)
+    rack-protection (2.2.3)
       rack
     redis (4.1.3)
-    sinatra (2.0.7)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.7)
+    ruby2_keywords (0.0.5)
+    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 (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby