diff --git a/www-client/firefox/firefox-63.0.1.ebuild b/www-client/firefox/firefox-63.0.1.ebuild
index 3b7c9d2ecfdf9..b2621cb3f5ce1 100644
--- a/www-client/firefox/firefox-63.0.1.ebuild
+++ b/www-client/firefox/firefox-63.0.1.ebuild
@@ -104,7 +104,7 @@ RDEPEND="${CDEPEND}
 DEPEND="${CDEPEND}
 	app-arch/zip
 	app-arch/unzip
-	dev-util/cbindgen
+	<dev-util/cbindgen-0.6.7
 	>=net-libs/nodejs-8.11.0
 	>=sys-devel/binutils-2.30
 	sys-apps/findutils
diff --git a/www-client/firefox/firefox-63.0.ebuild b/www-client/firefox/firefox-63.0.ebuild
index 3b7c9d2ecfdf9..b2621cb3f5ce1 100644
--- a/www-client/firefox/firefox-63.0.ebuild
+++ b/www-client/firefox/firefox-63.0.ebuild
@@ -104,7 +104,7 @@ RDEPEND="${CDEPEND}
 DEPEND="${CDEPEND}
 	app-arch/zip
 	app-arch/unzip
-	dev-util/cbindgen
+	<dev-util/cbindgen-0.6.7
 	>=net-libs/nodejs-8.11.0
 	>=sys-devel/binutils-2.30
 	sys-apps/findutils