diff --git a/Gemfile.lock b/Gemfile.lock
index f6428cb0..c1a561d5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,8 +152,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     acts_as_indexed (0.8.3)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (9.0.0)
@@ -251,7 +251,7 @@ GEM
     dotenv-rails (2.7.2)
       dotenv (= 2.7.2)
       railties (>= 3.2, < 6.1)
-    dragonfly (1.2.0)
+    dragonfly (1.4.0)
       addressable (~> 2.3)
       multi_json (~> 1.0)
       rack (>= 1.3)
@@ -416,7 +416,7 @@ GEM
     momentjs-rails (2.20.1)
       railties (>= 3.1)
     msgpack (1.2.9)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     multipart-post (2.0.0)
     nenv (0.3.0)
     net-scp (2.0.0)
@@ -450,11 +450,11 @@ GEM
     pry-stack_explorer (0.4.9.3)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (4.3.3)
       nio4r (~> 2.0)
     racc (1.5.2)
-    rack (2.1.1)
+    rack (2.2.3)
     rack-protection (2.0.5)
       rack
     rack-proxy (0.6.5)