diff --git a/Gemfile.lock b/Gemfile.lock
index 78d8935fa..c9b3a3d09 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,7 @@ DEPENDENCIES
   unicode
 
 RUBY VERSION
-   ruby 2.7.0p0
+   ruby 2.5.1p57
 
 BUNDLED WITH
    2.1.4