diff --git a/Gemfile.lock b/Gemfile.lock
index 5175645..55c01a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,8 +90,8 @@ GEM
     orm_adapter (0.4.0)
     pg (0.15.1)
     polyglot (0.3.3)
-    puma (1.6.3)
-      rack (~> 1.2)
+    puma (2.0.1)
+      rack (>= 1.1, < 2.0)
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)