diff --git a/charmcraft.yaml b/charmcraft.yaml
index 39a087b..eea5eac 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -58,3 +58,19 @@ bases:
       - name: "ubuntu"
         channel: "20.04"
         architectures: [arm64]
+  - build-on:
+      - name: "ubuntu"
+        channel: "20.04"
+        architectures: [amd64]
+    run-on:
+      - name: "ubuntu"
+        channel: "18.04"
+        architectures: [amd64]
+  - build-on:
+      - name: "ubuntu"
+        channel: "20.04"
+        architectures: [arm64]
+    run-on:
+      - name: "ubuntu"
+        channel: "18.04"
+        architectures: [arm64]