diff --git a/build.py b/build.py
index 0225bf4..a5cbb7c 100644
--- a/build.py
+++ b/build.py
@@ -22,7 +22,7 @@ def initialize(project):
         "mixin_types": ["RELEASE"],
         "release_type": "MINOR",
         "release_primary_build_file": "project.clj",
-        "release_secondary_build_file": ["package.json"],
+        "release_secondary_build_files": ["package.json"],
     }
 
     project.build_depends_on("ddadevops>=4.0.0-dev")