diff --git a/dev-util/ROPgadget/ROPgadget-9999.ebuild b/dev-util/ROPgadget/ROPgadget-9999.ebuild
index 909a1d0e113af..5fe796d1b34db 100644
--- a/dev-util/ROPgadget/ROPgadget-9999.ebuild
+++ b/dev-util/ROPgadget/ROPgadget-9999.ebuild
@@ -26,6 +26,7 @@ SLOT="0"
 RDEPEND="
 	${PYTHON_DEPS}
 	>=dev-libs/capstone-5.0.1[python,${PYTHON_USEDEP}]
+	<dev-libs/capstone-6[python,${PYTHON_USEDEP}]
 "
 
 python_test() {