diff --git a/Gemfile.lock b/Gemfile.lock
index a5cef8b..7b2824b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,11 +30,11 @@ GEM
     msgpack (1.3.3)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.3)
     parallel (1.19.2)
     parser (2.7.1.4)
       ast (~> 2.4.1)
-    puma (4.3.5)
+    puma (4.3.6)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.0.8.1)