diff --git a/config/pkg/ext/ext-ast.yml b/config/pkg/ext/ext-ast.yml
index 0684959d..776b82df 100644
--- a/config/pkg/ext/ext-ast.yml
+++ b/config/pkg/ext/ext-ast.yml
@@ -4,3 +4,6 @@ ext-ast:
     source:
       type: pecl
       name: ast
+    metadata:
+      license-files: [LICENSE]
+      license: BSD-3-Clause