diff --git a/Gemfile.lock b/Gemfile.lock
index 261b56d..b04def8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,8 +11,8 @@ GEM
     multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
-    puma (5.3.0)
+    nio4r (2.5.8)
+    puma (5.6.4)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.1.0)