diff --git a/lib/core-callback/dumper/req.js b/lib/core-callback/dumper/req.js
index 308163e..e1b0a97 100644
--- a/lib/core-callback/dumper/req.js
+++ b/lib/core-callback/dumper/req.js
@@ -76,7 +76,7 @@ ${JSON.stringify(req.body, null, 2)}
         //
     }
 
-    await fs.symlink(dumpFileName, lastSymbolicLinkName);
+    await fsPromise.symlink(dumpFileName, lastSymbolicLinkName);
 
     next();
 };
diff --git a/lib/core-callback/dumper/sender.js b/lib/core-callback/dumper/sender.js
index 092d97f..ddfc773 100644
--- a/lib/core-callback/dumper/sender.js
+++ b/lib/core-callback/dumper/sender.js
@@ -83,5 +83,5 @@ ${
         //
     }
 
-    await fs.symlink(dumpFileName, lastSymbolicLinkName);
+    await fsPromise.symlink(dumpFileName, lastSymbolicLinkName);
 };