diff --git a/Gemfile.lock b/Gemfile.lock
index 8b7afea..367eb84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,8 +93,7 @@ GEM
       activemodel (>= 4.0.0)
       activesupport (>= 4.0.0)
       mime-types (>= 1.16)
-    childprocess (0.9.0)
-      ffi (~> 1.0, >= 1.0.11)
+    childprocess (3.0.0)
     coderay (1.1.2)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
@@ -352,7 +351,7 @@ GEM
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
     ruby_dep (1.5.0)
-    rubyzip (1.2.2)
+    rubyzip (2.0.0)
     sass (3.7.3)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -373,9 +372,9 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
-    selenium-webdriver (3.141.0)
-      childprocess (~> 0.5)
-      rubyzip (~> 1.2, >= 1.2.2)
+    selenium-webdriver (3.142.7)
+      childprocess (>= 0.5, < 4.0)
+      rubyzip (>= 1.2.2)
     shellany (0.0.1)
     simple_form (4.1.0)
       actionpack (>= 5.0)