diff --git a/Gemfile.lock b/Gemfile.lock
index 5189824..c6b3d48 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
     safe_yaml (1.0.1)
     toml (0.1.1)
       parslet (~> 1.5.0)
-    yajl-ruby (1.1.0)
+    yajl-ruby (~> 1.3.1)
 
 PLATFORMS
   ruby