diff --git a/Gemfile b/Gemfile
index 8a6a9d8e..a1d723c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem "listen"
 
 gem "pg"
 
-gem "puma"
+gem "puma", ">= 4.3.8"
 
 # Use SCSS for stylesheets
 gem "sass-rails"