diff --git a/Gemfile.lock b/Gemfile.lock
index c0f693c..8fc2a33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,8 +10,8 @@ GEM
     mime-types-data (3.2019.0331)
     multi_xml (0.6.0)
     mustermann (1.0.3)
-    nio4r (2.4.0)
-    puma (4.0.1)
+    nio4r (2.5.8)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-protection (2.0.5)