diff --git a/.SRCINFO b/.SRCINFO
index 64bf916..2c0928f 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,10 +1,11 @@
 pkgbase = ruby-liquid
 	pkgdesc = Liquid markup language. Safe, customer facing template language for flexible web apps
 	pkgver = 4.0.0
-	pkgrel = 3
+	pkgrel = 4
 	url = https://shopify.github.io/liquid/
 	arch = any
 	license = MIT
+	makedepends = ruby-rdoc
 	depends = ruby
 	options = !emptydirs
 	source = ruby-liquid-4.0.0.tar.gz::https://github.com/Shopify/liquid/archive/v4.0.0.tar.gz
diff --git a/PKGBUILD b/PKGBUILD
index ad15fd9..e23b61a 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -3,11 +3,12 @@
 _gemname=liquid
 pkgname=ruby-$_gemname
 pkgver=4.0.0
-pkgrel=3
+pkgrel=4
 pkgdesc='Liquid markup language. Safe, customer facing template language for flexible web apps'
 url='https://shopify.github.io/liquid/'
 arch=('any')
 license=('MIT')
+makedepends=('ruby-rdoc')
 depends=('ruby')
 options=('!emptydirs')
 source=(${pkgname}-${pkgver}.tar.gz::https://github.com/Shopify/${_gemname}/archive/v${pkgver}.tar.gz)