diff --git a/Gemfile.lock b/Gemfile.lock
index 042dd5d..2318e99 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GIT
-  remote: git://github.com/mshibuya/remotipart.git
-  revision: e08ea9a3aa8db9a8b2b97b6c9e7b078ed08915f2
+  remote: https://github.com/mshibuya/remotipart.git
+  revision: a1860d64aef484047bc1ef50e2f19ef2480eacf9
   specs:
-    remotipart (1.4.2)
+    remotipart (1.4.4)
 
 GEM
   remote: https://rubygems.org/
@@ -48,8 +48,8 @@ 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)
     arel (9.0.0)
     autoprefixer-rails (8.6.2)
       execjs
@@ -170,7 +170,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.4.0)
     minitest (5.14.1)
@@ -216,7 +218,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.2.2)