diff --git a/packages/binding-coap/src/coap-server.ts b/packages/binding-coap/src/coap-server.ts
index d31acfa72..dff6656ed 100644
--- a/packages/binding-coap/src/coap-server.ts
+++ b/packages/binding-coap/src/coap-server.ts
@@ -83,7 +83,7 @@ export default class CoapServer implements ProtocolServer {
 
     constructor(config?: CoapServerConfig) {
         this.port = config?.port ?? 5683;
-        this.address = config?.address;
+        this.address = config?.address ?? "::";
 
         // WoT-specific content formats
         registerFormat(ContentSerdes.JSON_LD, 2100);