diff --git a/Gemfile.lock b/Gemfile.lock
index 3aadc57..0c9dcde 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,8 @@ GEM
     msgpack (1.2.4)
     multi_json (1.13.1)
     multi_xml (0.6.0)
-    mustermann (1.0.2)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     neovim (0.7.1)
       msgpack (~> 1.1)
       multi_json (~> 1.0)
@@ -89,8 +90,8 @@ GEM
       yard (~> 0.9.11)
     pry-theme (1.2.0)
       coderay (~> 1.1)
-    rack (2.0.5)
-    rack-protection (2.0.3)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rainbow (2.2.2)
       rake
@@ -108,10 +109,11 @@ GEM
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
     ruby-progressbar (1.9.0)
-    sinatra (2.0.3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.3)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     smart_colored (1.1.1)
     spoon (0.0.6)