diff --git a/Gemfile.lock b/Gemfile.lock
index 39b6145..981ea54 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,8 +47,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       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)
     arel (9.0.0)
     ast (2.4.0)
     bcrypt (3.1.12)
@@ -92,7 +92,7 @@ GEM
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
-    hashdiff (0.3.7)
+    hashdiff (1.0.0)
     health_check (3.0.0)
       railties (>= 5.0)
     htmlentities (4.3.4)
@@ -156,7 +156,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (3.0.3)
+    public_suffix (4.0.1)
     puma (3.12.0)
     rack (2.0.7)
     rack-cors (1.0.2)
@@ -245,7 +245,7 @@ GEM
     ruby-graphviz (1.2.3)
     ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
+    safe_yaml (1.0.5)
     seedbank (0.4.0)
     shoulda-matchers (3.1.2)
       activesupport (>= 4.0.0)
@@ -277,10 +277,10 @@ GEM
       thread_safe (~> 0.1)
     unicode-display_width (1.4.0)
     uniform_notifier (1.11.0)
-    webmock (3.4.2)
+    webmock (3.7.6)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
-      hashdiff
+      hashdiff (>= 0.4.0, < 2.0.0)
     websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)