diff --git a/Gemfile.lock b/Gemfile.lock
index 8ffbe91..f87e489 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -184,7 +184,7 @@ GEM
     parallel (1.12.0)
     parser (2.4.0.2)
       ast (~> 2.3)
-    poltergeist (1.16.0)
+    poltergeist (1.17.0)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)