diff --git a/Gemfile.lock b/Gemfile.lock
index 07e2d31b..c968e21d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -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)
@@ -358,7 +360,7 @@ GEM
     tilt (2.0.8)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     vcr (3.0.3)
     vegas (0.1.11)