diff --git a/Gemfile.lock b/Gemfile.lock
index 3db2a8e..6eaee88 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,8 +27,7 @@ GEM
       activesupport (>= 3.2.0)
       json (>= 1.7)
       mime-types (>= 1.16)
-    childprocess (0.7.1)
-      ffi (~> 1.0, >= 1.0.11)
+    childprocess (3.0.0)
     cliver (0.3.2)
     coderay (1.1.1)
     daemons (1.2.3)
@@ -53,7 +52,7 @@ GEM
       activesupport (>= 3.0.0)
     faraday (0.11.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.25)
+    ffi (1.15.5)
     fission (0.5.0)
       CFPropertyList (~> 2.2)
     fog (1.37.0)
@@ -268,10 +267,10 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
-    rubyzip (1.2.2)
-    selenium-webdriver (3.5.1)
-      childprocess (~> 0.5)
-      rubyzip (~> 1.0)
+    rubyzip (2.3.2)
+    selenium-webdriver (3.142.7)
+      childprocess (>= 0.5, < 4.0)
+      rubyzip (>= 1.2.2)
     sentry-raven (2.4.0)
       faraday (>= 0.7.6, < 1.0)
     sinatra (1.4.8)