diff --git a/package.json b/package.json
index 0adbf88..9267fab 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "substreams-sink",
-    "version": "0.15.1",
+    "version": "0.15.2",
     "description": "Substreams Sink",
     "type": "module",
     "exports": "./dist/index.js",
diff --git a/src/setup.ts b/src/setup.ts
index 6f52d8e..789e6ed 100644
--- a/src/setup.ts
+++ b/src/setup.ts
@@ -22,7 +22,7 @@ export async function setup(options: RunOptions) {
     // Substreams endpoint
     let baseUrl = options.substreamsEndpoint;
     const token = options.substreamsApiKey ?? options.substreamsApiToken;
-    if ( token.includes(".")) throw new Error("JWT token is not longer supported, please use Substreams API key instead");
+    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) {