diff --git a/Gemfile.lock b/Gemfile.lock
index ccc5069..7f9f741 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    mustermann (1.1.1)
+    mustermann (1.1.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     prometheus-client (0.10.0)
@@ -11,11 +11,11 @@ GEM
     puma-metrics (1.1.0)
       prometheus-client (~> 0.10)
       puma (>= 3.0)
-    rack (2.2.2)
+    rack (2.2.6.4)
     rack-protection (2.0.1)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
+    rack-test (2.1.0)
+      rack (>= 1.3)
     rake (13.0.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
@@ -30,13 +30,13 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.2)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     sinatra (2.0.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
       rack-protection (= 2.0.1)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.1.0)
 
 PLATFORMS
   ruby