diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 8bf46d15..3aac54df 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
     public_suffix (4.0.1)
-    puma (4.3.3)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-cors (1.1.1)