diff --git a/installers/charm/prometheus/charmcraft.yaml b/installers/charm/prometheus/charmcraft.yaml
index 0a285a9..babeda8 100644
--- a/installers/charm/prometheus/charmcraft.yaml
+++ b/installers/charm/prometheus/charmcraft.yaml
@@ -34,4 +34,6 @@
           - arm64
 parts:
   charm:
-    build-packages: [git]
+    build-packages:
+      - git
+      - libffi-dev