diff --git a/Gemfile.lock b/Gemfile.lock
index 630d32a..902e53f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,8 @@ GEM
     multipart-post (2.0.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.0.0)
-    puma (4.3.11)
+    nio4r (2.5.2)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.0.2)