diff --git a/Gemfile b/Gemfile
index 94002104e..bb19f9bec 100644
--- a/Gemfile
+++ b/Gemfile
@@ -77,7 +77,7 @@ group :test do
   gem 'coveralls', '~> 0.8.21', require: false
   gem 'database_cleaner', '~> 1.6.1'
   gem 'email_spec', '~> 2.1.0'
-  gem 'poltergeist', '~> 1.15.0'
+  gem 'poltergeist', '~> 1.17.0'
   gem 'rspec-rails', '~> 3.6'
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d7d210576..43623a06e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,8 +39,8 @@ GEM
     acts-as-taggable-on (4.0.0)
       activerecord (>= 4.0)
     acts_as_votable (0.10.0)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
     ahoy_matey (1.6.0)
       addressable
       browser (~> 2.0)
@@ -311,12 +311,12 @@ GEM
       activerecord (>= 4.2)
       activesupport (>= 4.2)
       arel (>= 6)
-    poltergeist (1.15.0)
+    poltergeist (1.17.0)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
     powerpack (0.1.1)
-    public_suffix (2.0.5)
+    public_suffix (3.0.1)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.8)
@@ -478,9 +478,9 @@ GEM
       activemodel (>= 4.2)
       debug_inspector
       railties (>= 4.2)
-    websocket-driver (0.6.5)
+    websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
+    websocket-extensions (0.1.3)
     whenever (0.9.7)
       chronic (>= 0.6.3)
     xpath (2.1.0)
@@ -542,7 +542,7 @@ DEPENDENCIES
   paranoia (~> 2.3.1)
   pg (~> 0.21.0)
   pg_search (~> 2.0.1)
-  poltergeist (~> 1.15.0)
+  poltergeist (~> 1.17.0)
   quiet_assets (~> 1.1.0)
   rails (= 4.2.10)
   rails-assets-leaflet!