diff --git a/Gemfile.lock b/Gemfile.lock
index 89cfc96..96e73a4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
       json (>= 1.4.6)
     diff-lcs (1.1.3)
     erubis (2.7.0)
-    ffi (1.2.0)
+    ffi (1.15.5)
     gherkin (2.11.2)
       json (>= 1.4.6)
     hike (1.2.1)