diff --git a/Gemfile.lock b/Gemfile.lock
index 8d4e7a9..bf5ab77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,8 @@ GEM
     minitest (5.11.3)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nenv (0.3.0)
     notiffany (0.1.3)
       nenv (~> 0.1)
@@ -73,8 +74,8 @@ GEM
     pry-remote (0.1.8)
       pry (~> 0.9)
       slop (~> 3.0)
-    rack (2.0.7)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -104,14 +105,15 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     shellany (0.0.1)
     shotgun (0.9.2)
       rack (>= 1.0)
-    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)
     sinatra-activerecord (2.0.13)
       activerecord (>= 3.2)
@@ -121,7 +123,7 @@ GEM
     slop (3.6.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tux (0.3.0)
       ripl (>= 0.3.5)
       ripl-multi_line (>= 0.2.4)