diff --git a/Gemfile.lock b/Gemfile.lock
index 07e2d31b..c025a107 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,8 +106,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
@@ -188,7 +188,7 @@ GEM
       image_size (>= 1.5, < 3)
       in_threads (~> 1.3)
       progress (~> 3.0, >= 3.0.1)
-    image_optim_pack (0.5.1-x86_64-darwin)
+    image_optim_pack (0.5.1)
       fspath (>= 2.1, < 4)
       image_optim (~> 0.19)
     image_processing (0.11.2)
@@ -213,7 +213,9 @@ GEM
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.8.0)
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)
@@ -248,7 +250,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     puma (3.11.3)
     rack (2.0.4)
     rack-cors (0.4.1)