diff --git a/Gemfile.lock b/Gemfile.lock
index 20fe925..62bf25a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -243,7 +243,7 @@ GEM
       websocket-driver (>= 0.2.0)
     powerpack (0.1.1)
     public_suffix (2.0.5)
-    puma (3.9.0)
+    puma (3.12.2)
     puma_worker_killer (0.1.0)
       get_process_mem (~> 0.2)
       puma (>= 2.7, < 4)