diff --git a/Gemfile.lock b/Gemfile.lock
index 504b98c..88c777d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -194,7 +194,7 @@ GEM
     parser (2.4.0.2)
       ast (~> 2.3)
     pg (0.21.0)
-    poltergeist (1.15.0)
+    poltergeist (1.17.0)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)