diff --git a/sample-rails-app/Gemfile.lock b/sample-rails-app/Gemfile.lock
index ac60378..377641a 100644
--- a/sample-rails-app/Gemfile.lock
+++ b/sample-rails-app/Gemfile.lock
@@ -1,8 +1,8 @@
 GIT
-  remote: git://github.com/mshibuya/remotipart.git
-  revision: 88d9a7d55bde66acb6cf3a3c6036a5a1fc991d5e
+  remote: https://github.com/mshibuya/remotipart.git
+  revision: a1860d64aef484047bc1ef50e2f19ef2480eacf9
   specs:
-    remotipart (1.2.1)
+    remotipart (1.4.4)
 
 GEM
   remote: https://rubygems.org/
@@ -45,7 +45,7 @@ GEM
     arel (6.0.3)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    builder (3.2.2)
+    builder (3.2.4)
     byebug (9.0.5)
     coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
@@ -55,6 +55,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.2)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     elasticsearch (2.0.0)
       elasticsearch-api (= 2.0.0)
@@ -79,7 +80,8 @@ GEM
     haml (4.0.7)
       tilt
     hashie (3.4.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
@@ -89,27 +91,28 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (5.0.5)
       railties (>= 3.2.16)
-    json (1.8.3)
+    json (1.8.6)
     kaminari (0.17.0)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
-    loofah (2.0.3)
-      nokogiri (>= 1.5.9)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
-    minitest (5.9.0)
+    mini_portile2 (2.8.6)
+    minitest (5.22.3)
     multi_json (1.12.1)
     multipart-post (2.0.0)
     nested_form (0.3.2)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
-    pkg-config (1.1.7)
-    rack (1.6.4)
+    nokogiri (1.16.5)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    racc (1.7.3)
+    rack (1.6.13)
     rack-pjax (0.8.0)
       nokogiri (~> 1.5)
       rack (~> 1.1)
@@ -126,14 +129,15 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.7.1)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
     rails_admin (0.8.1)
       builder (~> 3.1)
       coffee-rails (~> 4.0)
@@ -177,12 +181,12 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.3.11)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (2.0.5)
     turbolinks (5.0.1)
       turbolinks-source (~> 5)
     turbolinks-source (5.0.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (3.0.1)
       execjs (>= 0.3.0, < 3)