diff --git a/Gemfile.lock b/Gemfile.lock
index fcdcc460..5a69095f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -72,8 +72,8 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    puma (1.6.3)
-      rack (~> 1.2)
+    puma (2.6.0)
+      rack (>= 1.1, < 2.0)
     rack (1.5.2)
     rack-cache (1.2)
       rack (>= 0.4)