diff --git a/Gemfile.lock b/Gemfile.lock
index 915abe5..061acb3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,13 +40,13 @@ GEM
     multi_xml (0.6.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     pg (1.1.3)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    puma (5.6.4)
+    puma (6.3.1)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.2.0)