diff --git a/Gemfile.lock b/Gemfile.lock
index fd0ddf7..6be5bfd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,10 +32,10 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
-    puma (5.5.2)
+    puma (5.6.4)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.3.1)
+    rack-protection (2.2.0)
       rack
     rake (13.0.6)
     rb-fsevent (0.11.0)
@@ -44,10 +44,10 @@ GEM
     rerun (0.13.1)
       listen (~> 3.0)
     ruby2_keywords (0.0.5)
-    sinatra (2.1.0)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.23)
       activerecord (>= 4.1)