X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/964ab3dd90ff1508efc0c77378cde2b3a4da1029..91dc80d9060c5aeb04228f0f280ecc3db182ff94:/doc/Gemfile

diff --git a/doc/Gemfile b/doc/Gemfile
index 9ee5f581c3..061fa7585a 100644
--- a/doc/Gemfile
+++ b/doc/Gemfile
@@ -1,6 +1,10 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: CC-BY-SA-3.0
+
 source 'https://rubygems.org'
 
 gem 'zenweb'
-gem 'liquid'
+gem 'liquid', '~>4.0.0'
 gem 'RedCloth'
 gem 'colorize'