diff --git a/3135/3/Gemfile.lock b/3135/3/Gemfile.lock
index 98b94712b2..54978b8a76 100644
--- a/3135/3/Gemfile.lock
+++ b/3135/3/Gemfile.lock
@@ -18,20 +18,22 @@ GEM
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     minitest (5.11.3)
-    mustermann (1.0.3)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.4.0)
     puma (4.0.1)
       nio4r (~> 2.0)
-    rack (2.0.7)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rake (12.3.3)
+    ruby2_keywords (0.0.5)
     shotgun (0.9.2)
       rack (>= 1.0)
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.13)
       activerecord (>= 3.2)
@@ -40,7 +42,7 @@ GEM
       sinatra (>= 1.0.0)
     sqlite3 (1.4.1)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)