diff --git a/Gemfile.lock b/Gemfile.lock
index f7f9d7136..ceb343844 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,7 +54,7 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    childprocess (0.8.0)
+    childprocess (0.9.0)
       ffi (~> 1.0, >= 1.0.11)
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
@@ -63,7 +63,7 @@ GEM
       addressable
     docile (1.1.5)
     erubi (1.7.0)
-    ffi (1.9.18)
+    ffi (1.9.23)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
     htmlentities (4.3.4)
@@ -144,9 +144,9 @@ GEM
       roadie (~> 3.1)
     ruby-openid (2.3.0)
     rubyzip (1.2.1)
-    selenium-webdriver (3.6.0)
+    selenium-webdriver (3.11.0)
       childprocess (~> 0.5)
-      rubyzip (~> 1.0)
+      rubyzip (~> 1.2)
     simplecov (0.14.1)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)