diff --git a/Gemfile.lock b/Gemfile.lock
index 630d32a..5aca8dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,13 +48,13 @@ GEM
     minitest (5.14.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.0.0)
     puma (4.3.11)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.0.2)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -72,11 +72,11 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.6.0)
     rspec-support (3.6.0)
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.2)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.2)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     slack-ruby-bot (0.10.1)
       hashie
@@ -91,7 +91,7 @@ GEM
       websocket-driver
     thor (0.19.4)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     timers (4.1.2)
       hitimes
     tzinfo (1.2.7)