diff --git a/website/Gemfile.lock b/website/Gemfile.lock
index cf754ae5..065cef31 100644
--- a/website/Gemfile.lock
+++ b/website/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
   specs:
     mustermann (1.0.3)
     nio4r (2.5.2)
-    puma (4.3.1)
+    puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.0.8)
     rack-protection (2.0.7)