X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/f4ca9ad94a6bb006d1f3c7ba207837f1736d1247..09d4326a8a853f9a5f05acb434d92c06156ec107:/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'