diff --git a/gulpfile.js b/gulpfile.js
index 36889fb..646a035 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -93,7 +93,7 @@ const jsonToNeDB = () =>
             try {
                 file.contents = Buffer.from(
                     JSON.parse(file.contents.toString())
-                        .map(cleanPackEntry)
+                        .map((entry) => cleanPackEntry(entry))
                         .map((entry) => JSON.stringify(entry))
                         .join("\n") + "\n",
                 );
@@ -131,7 +131,13 @@ const neDBToJSON = () =>
                     if (err) {
                         callback(err);
                     } else {
-                        file.contents = Buffer.from(JSON.stringify(docs.map(cleanPackEntry), undefined, 4) + "\n");
+                        file.contents = Buffer.from(
+                            JSON.stringify(
+                                docs.map((entry) => cleanPackEntry(entry)),
+                                undefined,
+                                4,
+                            ) + "\n",
+                        );
                         file.path = path.join(
                             path.dirname(file.path),
                             path.basename(file.path, path.extname(file.path)) + ".json",