diff --git a/Gemfile.lock b/Gemfile.lock
index 4fb2ad4..f0feed3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
-    dockerfile-rails (1.6.19)
+    dockerfile-rails (1.6.20)
       rails (>= 3.0.0)
     drb (2.2.1)
     erubi (1.13.0)