diff --git a/media-gfx/fdm-materials/metadata.xml b/media-gfx/fdm-materials/metadata.xml
index 2137fee2cdb5d..9db3a37e1c15a 100644
--- a/media-gfx/fdm-materials/metadata.xml
+++ b/media-gfx/fdm-materials/metadata.xml
@@ -5,10 +5,25 @@
 		<email>3dprint@gentoo.org</email>
 		<name>Gentoo 3D Printer Project</name>
 	</maintainer>
+	<maintainer type="person">
+		<email>alexxy@gentoo.org</email>
+		<name>Alexey Shvetsov</name>
+	</maintainer>
 	<maintainer type="project">
 		<email>proxy-maint@gentoo.org</email>
-		<name>Gentoo Proxy Maintainers Project</name>
+		<name>Proxy Maintainers</name>
 	</maintainer>
+	<maintainer type="person">
+		<email>mathy@vanvoorden.be</email>
+		<name>Mathy Vanvoorden</name>
+	</maintainer>
+	<maintainer type="person">
+		<email>perlovka@gmail.com</email>
+		<name>Michael Perlov</name>
+	</maintainer>
+	<slots>
+		<subslots>soname major version number</subslots>
+	</slots>
 	<upstream>
 		<remote-id type="github">Ultimaker/fdm_materials</remote-id>
 	</upstream>