diff --git a/Gemfile.lock b/Gemfile.lock
index d700360..d0081fd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     archive-tar-minitar (0.5.2)
     erubis (2.6.6)
       abstract (>= 1.0.0)
-    ffi (1.0.9)
+    ffi (1.15.5)
     i18n (0.5.0)
     json (1.5.1)
     mario (0.0.6)