diff --git a/Gemfile.lock b/Gemfile.lock
index c7d95c3..cebf2d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     multipart-post (2.1.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     parallel (1.19.1)
     parser (2.7.0.2)
       ast (~> 2.4.0)
@@ -39,7 +39,7 @@ GEM
     pry-byebug (3.8.0)
       byebug (~> 11.0)
       pry (~> 0.10)
-    puma (4.3.1)
+    puma (5.6.2)
       nio4r (~> 2.0)
     rack (2.1.2)
     rack-protection (2.0.8.1)