diff --git a/Gemfile.lock b/Gemfile.lock
index 4d4ec7644..dd632e579 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,8 +45,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrake (9.1.0)
       airbrake-ruby (~> 4.2)
     airbrake-ruby (4.2.5)
@@ -81,8 +81,8 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
-    crack (0.4.2)
-      safe_yaml (~> 1.0.0)
+    crack (0.4.5)
+      rexml
     crass (1.0.4)
     cucumber (1.3.20)
       builder (>= 2.1.2)
@@ -146,6 +146,7 @@ GEM
       haml (>= 4.0.6, < 6.0)
       html2haml (>= 1.0.1)
       railties (>= 4.0.1)
+    hashdiff (1.0.1)
     html2haml (2.2.0)
       erubis (~> 2.7.0)
       haml (>= 4.0, < 6)
@@ -204,7 +205,7 @@ GEM
       capybara (>= 2.1, < 4)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.0)
     pundit (2.0.1)
       activesupport (>= 3.0.0)
@@ -262,6 +263,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
+    rexml (3.2.5)
     rspec-core (3.8.0)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.2)
@@ -282,7 +284,6 @@ GEM
     ruby_parser (3.12.0)
       sexp_processor (~> 4.9)
     rubyzip (1.2.2)
-    safe_yaml (1.0.4)
     sass (3.5.3)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -333,9 +334,10 @@ GEM
       activemodel (>= 4.2)
       debug_inspector
       railties (>= 4.2)
-    webmock (1.21.0)
+    webmock (3.13.0)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
     websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)