diff --git a/Gemfile.lock b/Gemfile.lock
index 369f333..8c778fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,8 @@ GEM
     addressable (2.5.1)
       public_suffix (~> 2.0, >= 2.0.2)
     colorator (1.1.0)
-    ffi (1.9.18-x86-mingw32)
+    ffi (1.11.2)
+    ffi (1.11.2-x86-mingw32)
     forwardable-extended (2.6.0)
     jekyll (3.5.0)
       addressable (~> 2.4)
@@ -48,6 +49,7 @@ GEM
       tzinfo (>= 1.0.0)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES