diff --git a/src/curve.js b/src/curve.js
index 5c5fe59e..1ac667bb 100644
--- a/src/curve.js
+++ b/src/curve.js
@@ -63,7 +63,7 @@ exports.generateKeyPair = function() {
         const keyPair = curveJs.generateKeyPair(nodeCrypto.randomBytes(32));
         return {
             privKey: Buffer.from(keyPair.private),
-            pubKey: Buffer.from(keyPair.public),
+            pubKey: Buffer.concat([Buffer.from([5]), Buffer.from(keyPair.public)]),
         };
     }
 };
@@ -117,4 +117,4 @@ exports.verifySignature = function(pubKey, msg, sig) {
         throw new Error("Invalid signature");
     }
     return curveJs.verify(pubKey, msg, sig);
-};
\ No newline at end of file
+};