diff --git a/Gemfile.lock b/Gemfile.lock
index bece9e2..e293134 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,11 +9,11 @@ GEM
     json (2.6.3)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     parallel (1.22.1)
     parser (3.2.0.0)
       ast (~> 2.4.1)
-    puma (6.0.2)
+    puma (6.3.1)
       nio4r (~> 2.0)
     rack (2.2.6.4)
     rack-protection (3.0.5)