diff --git a/Gemfile.lock b/Gemfile.lock
index bbd176c..35b5e37 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
       method_source (>= 0.6.7)
       rake (>= 0.9.2.2)
     method_source (1.1.0)
-    mini_portile2 (2.8.6)
+    mini_portile2 (2.8.7)
     minitest (5.22.3)
     mocha (2.2.0)
       ruby2_keywords (>= 0.0.5)