diff --git a/Gemfile.lock b/Gemfile.lock
index dded63b8..29f55970 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,11 +1,11 @@
 GIT
-  remote: git://github.com/chrisk/fakeweb.git
+  remote: https://github.com/chrisk/fakeweb.git
   revision: 2b08c1ff2714ec13a12f3497d67fcefce95c2cbe
   specs:
     fakeweb (1.3.0)
 
 GIT
-  remote: git://github.com/plataformatec/show_for.git
+  remote: https://github.com/plataformatec/show_for.git
   revision: 7f2dc583ee84e9fd86d00c70c5e63027b20a8efc
   specs:
     show_for (0.3.0.rc)
@@ -36,8 +36,9 @@ GEM
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    active_model_serializers (0.8.1)
-      activemodel (>= 3.0)
+    active_model_serializers (0.9.12)
+      activemodel (>= 3.2)
+      concurrent-ruby (~> 1.0)
     active_utils (1.0.5)
       activesupport (>= 2.3.11)
       i18n
@@ -83,7 +84,7 @@ GEM
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 1.14.3, < 2)
       sassc-rails (>= 2.0.0)
-    builder (3.2.3)
+    builder (3.2.4)
     cancan (1.6.9)
     capybara (3.12.0)
       addressable
@@ -233,7 +234,7 @@ GEM
     mime-types (1.25.1)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    minitest (5.22.3)
     mixlib-cli (1.4.0)
     money (6.5.0)
       i18n (>= 0.6.4, <= 0.7.0)
@@ -425,7 +426,7 @@ GEM
     thread_safe (0.3.6)
     tilt (2.0.9)
     timecop (0.6.1)
-    tzinfo (1.2.5)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)