diff --git a/Gemfile.lock b/Gemfile.lock
index b3b1194..2411b16 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,8 +62,8 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.2)
       xpath (~> 3.2)
-    childprocess (0.9.0)
-      ffi (~> 1.0, >= 1.0.11)
+    childprocess (1.0.1)
+      rake (< 13.0)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
     crack (0.4.3)
@@ -90,7 +90,7 @@ GEM
     execjs (2.7.0)
     faraday (0.12.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.25)
+    ffi (1.11.1)
     geckodriver-helper (0.23.0)
       archive-zip (~> 0.7)
     globalid (0.4.2)
@@ -218,8 +218,8 @@ GEM
       tilt (>= 1.1, < 3)
     sdoc (1.0.0)
       rdoc (>= 5.0)
-    selenium-webdriver (3.141.0)
-      childprocess (~> 0.5)
+    selenium-webdriver (3.142.3)
+      childprocess (>= 0.5, < 2.0)
       rubyzip (~> 1.2, >= 1.2.2)
     shoulda-matchers (4.0.1)
       activesupport (>= 4.2.0)