diff --git a/Gemfile.lock b/Gemfile.lock
index 348fbf9..97ce17f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -168,7 +168,7 @@ GEM
       responders
       warden (~> 1.2.3)
     diffy (3.3.0)
-    dragonfly (1.2.0)
+    dragonfly (1.4.0)
       addressable (~> 2.3)
       multi_json (~> 1.0)
       rack (>= 1.3)
@@ -214,13 +214,13 @@ GEM
       i18n (>= 0.6.10, < 2)
       request_store (~> 1.0)
     msgpack (1.3.1)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
     nio4r (2.5.2)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     pg (1.1.4)
-    public_suffix (4.0.1)
+    public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.2.3)