diff --git a/packages/api/src/middlewares/index.ts b/packages/api/src/middlewares/index.ts
index e5e9bfe06..832617df5 100644
--- a/packages/api/src/middlewares/index.ts
+++ b/packages/api/src/middlewares/index.ts
@@ -159,7 +159,7 @@ export function verifySignature(
         // validate signature timestamp
         const timestamp = message as string;
         const expirationDate = new Date();
-        expirationDate.setSeconds(expirationDate.getSeconds() - config.signatureExpiration);
+        expirationDate.setDate(expirationDate.getDate() - config.signatureExpiration);
         if (!timestamp || parseInt(timestamp) < expirationDate.getTime()) {
             res.status(403).json({
                 success: false,
diff --git a/packages/core/src/config/validatenv.ts b/packages/core/src/config/validatenv.ts
index fb9e39c07..cdd283206 100644
--- a/packages/core/src/config/validatenv.ts
+++ b/packages/core/src/config/validatenv.ts
@@ -101,7 +101,7 @@ function validateEnv() {
         SUBGRAPH_URL: str({ devDefault: onlyOnTestEnv('xyz') }),
         COUNCIL_SUBGRAPH_URL: str({ devDefault: onlyOnTestEnv('xyz') }),
         IMAGE_HANDLER_URL: str({ devDefault: onlyOnTestEnv('xyz') }),
-        SIGNATURE_EXPIRATION: num({ default: 864000 }),
+        SIGNATURE_EXPIRATION: num({ default: 15 }),
         SIGNATURE_MESSAGE: str({ devDefault: onlyOnTestEnv('xyz') }),
     });
 }