diff --git a/Gemfile.lock b/Gemfile.lock
index 3246a902d..55ae5ec09 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    childprocess (1.0.0)
+    childprocess (3.0.0)
     coderay (1.1.2)
     coveralls (0.8.23)
       json (>= 1.8, < 3)
@@ -91,8 +91,8 @@ GEM
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
-    selenium-webdriver (3.142.5)
-      childprocess (>= 0.5, < 3.0)
+    selenium-webdriver (3.142.6)
+      childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
     sequel (5.25.0)
     simplecov (0.16.1)