diff --git a/buildpack.toml b/buildpack.toml
index dbe329a..0c17495 100644
--- a/buildpack.toml
+++ b/buildpack.toml
@@ -1,4 +1,4 @@
-api = "0.10"
+api = "0.8"
 
 [buildpack]
 id = "heroku/procfile"
@@ -11,13 +11,16 @@ keywords = ["procfile", "processes", "heroku"]
 [[buildpack.licenses]]
 type = "BSD-3-Clause"
 
-[[targets]]
+[[stacks]]
+id = "*"
+
+[metadata.release]
+image = { repository = "docker.io/heroku/procfile-cnb" }
+
+[[metadata.targets]]
 os = "linux"
 arch = "amd64"
 
-[[targets]]
+[[metadata.targets]]
 os = "linux"
 arch = "arm64"
-
-[metadata.release]
-image = { repository = "docker.io/heroku/procfile-cnb" }