diff --git a/Gemfile.lock b/Gemfile.lock
index d557187..5bc4940 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,8 @@ GEM
     docile (1.1.5)
     equalizer (0.0.11)
     erubis (2.7.0)
-    ffi (1.9.21-java)
+    ffi (1.13.1)
+    ffi (1.13.1-java)
     fuubar (2.3.1)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)