diff --git a/Gemfile.lock b/Gemfile.lock
index 05cec18..8134223 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,22 +7,22 @@ GEM
       open4 (~> 1.3.4)
       rake
     minitest (5.11.3)
-    mustermann (1.0.2)
+    mustermann (1.0.3)
     open4 (1.3.4)
-    rack (2.0.4)
-    rack-protection (2.0.1)
+    rack (2.0.7)
+    rack-protection (2.0.5)
       rack
     rake (12.3.1)
-    sinatra (2.0.1)
+    sinatra (2.0.5)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.1)
+      rack-protection (= 2.0.5)
       tilt (~> 2.0)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.8)
+    tilt (2.0.9)
 
 PLATFORMS
   ruby