diff --git a/Gemfile.lock b/Gemfile.lock
index 9b012392a1..ec11fc37d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,10 +1,10 @@
 GIT
-  remote: git://github.com/rails/activemodel-serializers-xml.git
-  revision: dd9c0acf26aab111ebc647cd8deb99ebc6946531
+  remote: https://github.com/rails/activemodel-serializers-xml.git
+  revision: 32841fdf59c2297436177a8e6d84f4f17e048005
   specs:
-    activemodel-serializers-xml (1.0.1)
-      activemodel (> 5.x)
-      activesupport (> 5.x)
+    activemodel-serializers-xml (1.0.2)
+      activemodel (>= 5.0.0.a)
+      activesupport (>= 5.0.0.a)
       builder (~> 3.1)
 
 PATH
@@ -61,6 +61,7 @@ GEM
     bcrypt (3.1.11)
     builder (3.2.3)
     concurrent-ruby (1.0.5)
+    crass (1.0.6)
     erubi (1.6.0)
     faraday (0.11.0)
       multipart-post (>= 1.2, < 3)
@@ -69,7 +70,8 @@ GEM
     hashie (3.5.5)
     i18n (0.8.1)
     jwt (1.5.6)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.5)
       mime-types (>= 1.16, < 4)
@@ -78,7 +80,7 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.4.0)
     minitest (5.10.1)
     mocha (1.2.1)
       metaclass (~> 0.0.1)
@@ -86,8 +88,8 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.0.0)
     nio4r (2.0.0)
-    nokogiri (1.7.1)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     oauth2 (1.3.1)
       faraday (>= 0.8, < 0.12)
       jwt (~> 1.0)