diff --git a/manifest.toml b/manifest.toml
index d72afaf..86ebddb 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -70,7 +70,7 @@ ram.runtime = "50M"
     main.default = 8000
 
     [resources.apt]
-    packages = "postgresql, postgresql-contrib, python3-venv, libpq-dev"
+    packages = "postgresql, postgresql-contrib, python3-venv, libpq-dev, python3-dev"
 
     [resources.database]
     type = "postgresql"