diff --git a/Gemfile.lock b/Gemfile.lock
index 4374563..44063e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,8 +65,8 @@ GEM
     childprocess (3.0.0)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
+    crack (0.4.5)
+      rexml
     crass (1.0.5)
     debug_inspector (0.0.3)
     delayed_job (4.1.8)
@@ -97,7 +97,7 @@ GEM
       archive-zip (~> 0.7)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    hashdiff (1.0.0)
+    hashdiff (1.0.1)
     hashie (3.6.0)
     http (4.3.0)
       addressable (~> 2.3)
@@ -152,7 +152,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (4.0.3)
+    public_suffix (4.0.6)
     puma (3.12.1)
     rack (2.2.2)
     rack-proxy (0.6.5)
@@ -189,6 +189,7 @@ GEM
       ffi (>= 0.5.0, < 2)
     rdoc (6.0.4)
     regexp_parser (1.6.0)
+    rexml (3.2.4)
     rspec-core (3.9.0)
       rspec-support (~> 3.9.0)
     rspec-expectations (3.9.0)
@@ -207,7 +208,6 @@ GEM
       rspec-support (~> 3.9.0)
     rspec-support (3.9.0)
     rubyzip (2.0.0)
-    safe_yaml (1.0.5)
     sass (3.5.7)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -246,7 +246,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.6)
-    webmock (3.8.2)
+    webmock (3.11.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)