diff --git a/Gemfile b/Gemfile
index 8204e3f..b27dfcf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ gem 'bcrypt-ruby', '3.1.5'
 gem 'acts-as-taggable-on', '2.2.2'
 gem 'multi_json', '1.10.1'
 gem 'rubyzip', '1.0.0'
-gem 'rest-client', '= 1.6.7'
+gem 'rest-client', '1.8.0'
 gem 'vpim', '= 13.11.11'
 gem 'test-unit'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8f33203..a1cc8a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,6 +70,8 @@ GEM
       warden (~> 1.2.3)
     devise-token_authenticatable (0.1.0)
       devise (~> 3.2.0)
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     exception_notification (4.1.1)
       actionmailer (>= 3.0.4)
@@ -80,6 +82,8 @@ GEM
     highline (1.7.8)
     hike (1.2.3)
     htmlentities (4.3.4)
+    http-cookie (1.0.5)
+      domain_name (~> 0.5)
     i18n (0.6.11)
     journey (1.0.4)
     jquery-rails (3.0.4)
@@ -102,6 +106,7 @@ GEM
     net-ssh (2.6.5)
     net-ssh-gateway (1.2.0)
       net-ssh (>= 2.6.5)
+    netrc (0.11.0)
     nokogiri (1.6.3.1)
       mini_portile (= 0.6.0)
     orm_adapter (0.5.0)
@@ -142,8 +147,10 @@ GEM
     recaptcha (4.6.6)
       json
     ref (2.0.0)
-    rest-client (1.6.7)
-      mime-types (>= 1.16)
+    rest-client (1.8.0)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 3.0)
+      netrc (~> 0.7)
     rubyzip (1.0.0)
     sass (3.4.22)
     sass-rails (3.2.6)
@@ -170,6 +177,9 @@ GEM
     tzinfo (0.3.48)
     uglifier (3.0.0)
       execjs (>= 0.3.0, < 3)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.8.2)
     vpim (13.11.11)
     warden (1.2.3)
       rack (>= 1.0)
@@ -208,7 +218,7 @@ DEPENDENCIES
   rails (= 3.2.22)
   rake (= 10.3.2)
   recaptcha (= 4.6.6)
-  rest-client (= 1.6.7)
+  rest-client (= 1.8.0)
   rubyzip (= 1.0.0)
   sass-rails (~> 3.2.3)
   test-unit