diff --git a/6-neural-networks/Gemfile.lock b/6-neural-networks/Gemfile.lock
index 2503a33..b04fabb 100644
--- a/6-neural-networks/Gemfile.lock
+++ b/6-neural-networks/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     nio4r (2.5.8)
-    puma (4.3.11)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (1.6.12)
     rack-protection (1.5.5)