diff --git a/package.json b/package.json
index 923effd..0c47568 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "substreams-sink",
-    "version": "0.14.0",
+    "version": "0.14.1",
     "description": "Substreams Sink",
     "type": "module",
     "exports": "./dist/index.js",
diff --git a/src/setup.ts b/src/setup.ts
index 08a71c1..f243e5b 100644
--- a/src/setup.ts
+++ b/src/setup.ts
@@ -23,7 +23,8 @@ export async function setup(options: RunOptions) {
 
     // Substreams endpoint
     let baseUrl = options.substreamsEndpoint;
-    const token = options.substreamsApiToken ?? options.substreamsApiKey;
+    const token = options.substreamsApiKey ?? options.substreamsApiToken;
+    if ( token.includes(".")) throw new Error("JWT token is not longer supported, please use Substreams API key instead");
 
     // append https if not present
     if (baseUrl.match(/http/) === null) {