diff --git a/Gemfile.lock b/Gemfile.lock
index ab6beddf..4ca3ecbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
     capistrano-bundler (1.1.4)
       capistrano (~> 3.1)
       sshkit (~> 1.2)
-    capistrano-maintenance (1.0.0)
+    capistrano-maintenance (1.2.0)
       capistrano (>= 3.0)
     capistrano-rails (1.1.3)
       capistrano (~> 3.1)
@@ -100,7 +100,6 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.9.1.1)
-    colorize (0.7.7)
     concurrent-ruby (1.1.5)
     crass (1.0.4)
     database_cleaner (1.5.0)
@@ -127,7 +126,6 @@ GEM
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.10.0)
       faraday (>= 0.7.4, < 0.10)
-    ffi (1.10.0)
     ffi (1.10.0-java)
     figaro (1.1.1)
       thor (~> 0.14)
@@ -284,7 +282,7 @@ GEM
     multipart-post (2.0.0)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
-    net-ssh (2.9.2)
+    net-ssh (4.2.0)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     nokogiri (1.8.5-java)
@@ -379,8 +377,7 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.10)
-    sshkit (1.7.1)
-      colorize (>= 0.7.0)
+    sshkit (1.18.2)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     thor (0.20.3)