diff --git a/Gemfile.lock b/Gemfile.lock
index 6d2502e..3bbd0ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,8 +12,8 @@ GEM
     json (2.3.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.4)
-    puma (5.0.4)
+    nio4r (2.5.7)
+    puma (5.3.1)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.1.0)