diff --git a/Gemfile.lock b/Gemfile.lock
index f97876f..d57ed68 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,12 +100,12 @@ GEM
       mini_mime (>= 0.1.1)
     method_source (0.9.0)
     mini_mime (1.0.0)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
     nio4r (2.2.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     pg (1.0.0)
     popper_js (1.12.9)