diff --git a/examples/nodejs_contract/echo_contract.js b/examples/nodejs_contract/echo_contract.js
index 8a0c07b8..7b152b55 100644
--- a/examples/nodejs_contract/echo_contract.js
+++ b/examples/nodejs_contract/echo_contract.js
@@ -57,10 +57,25 @@ const echoContract = async (ctx) => {
 
     // NPL messages example.
     // if (!ctx.readonly) {
-    //     ctx.unl.onMessage((node, msg) => {
-    //         console.log(msg + " from " + node.publicKey);
-    //     })
+    //     // Start listening to incoming NPL messages before we send ours.
+    //     const promise = new Promise((resolve, reject) => {
+    //         let timeout = setTimeout(() => {
+    //             reject('NPL timeout.');
+    //         }, 2000);
+
+    //         let list = [];
+    //         ctx.unl.onMessage((node, msg) => {
+    //             console.log(`${node.publicKey} said ${msg} to me.`);
+    //             list.push(msg);
+    //             if (list.length == ctx.unl.list().length) {
+    //                 clearTimeout(timeout);
+    //                 resolve();
+    //             }
+    //         });
+    //     });
+
     //     await ctx.unl.send("Hello");
+    //     await promise;
     // }
 
     // Update patch config
diff --git a/examples/nodejs_contract/package-lock.json b/examples/nodejs_contract/package-lock.json
index 626f2333..4ae9c899 100644
--- a/examples/nodejs_contract/package-lock.json
+++ b/examples/nodejs_contract/package-lock.json
@@ -6,7 +6,7 @@
         "": {
             "dependencies": {
                 "bson": "4.0.4",
-                "hotpocket-nodejs-contract": "0.5.5",
+                "hotpocket-nodejs-contract": "0.5.10",
                 "seedrandom": "3.0.5"
             }
         },
@@ -37,9 +37,9 @@
             }
         },
         "node_modules/hotpocket-nodejs-contract": {
-            "version": "0.5.5",
-            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.5.tgz",
-            "integrity": "sha512-eeBBILgSMU1Yx6ulH7QIvgwVIgFkOuXJFdR4PZ2BeMk4KKr2ixl1YrB/V9UB/cg7ObKJCOH+hsU7oxbxECcBmQ=="
+            "version": "0.5.10",
+            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.10.tgz",
+            "integrity": "sha512-1Cw9WcyoQmJabGkjRbM4FZ1HMvUI3z6IVTbhi0BDiD+K1c6bHROPgNKbIHCSL15+Z5xvbHpeuOOPLGogGtdC7Q=="
         },
         "node_modules/ieee754": {
             "version": "1.1.13",
@@ -82,9 +82,9 @@
             }
         },
         "hotpocket-nodejs-contract": {
-            "version": "0.5.5",
-            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.5.tgz",
-            "integrity": "sha512-eeBBILgSMU1Yx6ulH7QIvgwVIgFkOuXJFdR4PZ2BeMk4KKr2ixl1YrB/V9UB/cg7ObKJCOH+hsU7oxbxECcBmQ=="
+            "version": "0.5.10",
+            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.10.tgz",
+            "integrity": "sha512-1Cw9WcyoQmJabGkjRbM4FZ1HMvUI3z6IVTbhi0BDiD+K1c6bHROPgNKbIHCSL15+Z5xvbHpeuOOPLGogGtdC7Q=="
         },
         "ieee754": {
             "version": "1.1.13",
diff --git a/examples/nodejs_contract/package.json b/examples/nodejs_contract/package.json
index 25179058..31bca1ba 100644
--- a/examples/nodejs_contract/package.json
+++ b/examples/nodejs_contract/package.json
@@ -5,7 +5,7 @@
         "build-diag": "ncc build diagnostic_contract.js -o dist/diagnostic-contract"
     },
     "dependencies": {
-        "hotpocket-nodejs-contract": "0.5.5",
+        "hotpocket-nodejs-contract": "0.5.10",
         "bson": "4.0.4",
         "seedrandom": "3.0.5"
     }