diff --git a/lib/expressapp.js b/lib/expressapp.js
index c7336ff..d955af4 100644
--- a/lib/expressapp.js
+++ b/lib/expressapp.js
@@ -289,6 +289,12 @@ ExpressApp.prototype.start = function(opts, cb) {
     });
   });
 
+  router.post('/v1/txproposals/', function(req, res) {
+    var Errors = require('./errors/errordefinitions');
+    var err = Errors.UPGRADE_NEEDED;
+    return returnError(err, res, req);
+  });
+
   router.post('/v2/txproposals/', function(req, res) {
     getServerWithAuth(req, res, function(server) {
       server.createTx(req.body, function(err, txp) {