diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index 93a6d43..e4b7b06
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     colorator (0.1)
-    ffi (1.9.10)
+    ffi (1.15.3)
     jekyll (3.0.3)
       colorator (~> 0.1)
       jekyll-sass-converter (~> 1.0)