diff --git a/dev-python/nbconvert/nbconvert-6.0.7.ebuild b/dev-python/nbconvert/nbconvert-6.0.7.ebuild
index 1fd436ba5275b..87597d4755dba 100644
--- a/dev-python/nbconvert/nbconvert-6.0.7.ebuild
+++ b/dev-python/nbconvert/nbconvert-6.0.7.ebuild
@@ -12,7 +12,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~sparc x86"
+KEYWORDS="amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~s390 ~sparc x86"
 
 RDEPEND="
 	dev-python/bleach[${PYTHON_USEDEP}]