diff --git a/Gemfile.lock b/Gemfile.lock
index 3454201..b76b5c4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -184,7 +184,7 @@ GEM
     parallel (1.12.1)
     parser (2.5.1.0)
       ast (~> 2.4.0)
-    poltergeist (1.18.0)
+    poltergeist (1.18.1)
       capybara (>= 2.1, < 4)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)