diff --git a/dev-python/oslo-serialization/oslo-serialization-4.0.2.ebuild b/dev-python/oslo-serialization/oslo-serialization-4.0.2.ebuild
index eefe1c63316d4..6c3dedea33145 100644
--- a/dev-python/oslo-serialization/oslo-serialization-4.0.2.ebuild
+++ b/dev-python/oslo-serialization/oslo-serialization-4.0.2.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=7
 
-PYTHON_COMPAT=( python3_8 )
+PYTHON_COMPAT=( python3_{8..9} )
 inherit distutils-r1
 
 MY_PN=${PN/-/.}