diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
old mode 100755
new mode 100644
index 04689693..f3149120
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     colorator (0.1)
     execjs (2.4.0)
     fast-stemmer (1.0.2)
-    ffi (1.9.8)
+    ffi (1.13.1)
     gemoji (2.1.0)
     github-pages (33)
       RedCloth (= 4.2.9)