diff --git a/advanced/DispatchGroup/sinatra/Gemfile.lock b/advanced/DispatchGroup/sinatra/Gemfile.lock
index 989d1a36..d88cd230 100644
--- a/advanced/DispatchGroup/sinatra/Gemfile.lock
+++ b/advanced/DispatchGroup/sinatra/Gemfile.lock
@@ -1,18 +1,18 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.3)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby