diff --git a/examples/onchain-signer/contracts/Gasless.sol b/examples/onchain-signer/contracts/Gasless.sol
index c1716987..806581ab 100644
--- a/examples/onchain-signer/contracts/Gasless.sol
+++ b/examples/onchain-signer/contracts/Gasless.sol
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.19;
 
+import {encryptCallData} from "@oasisprotocol/sapphire-contracts/contracts/CalldataEncryption.sol";
 import {EIP155Signer} from "@oasisprotocol/sapphire-contracts/contracts/EIP155Signer.sol";
 
 struct EthereumKeypair {
@@ -26,7 +27,6 @@ contract Gasless {
     ) external view returns (bytes memory output) {
         bytes memory data = abi.encode(innercallAddr, innercall);
 
-        // Call will invoke proxy().
         return
             EIP155Signer.sign(
                 kp.addr,
@@ -37,7 +37,7 @@ contract Gasless {
                     gasLimit: 250000,
                     to: address(this),
                     value: 0,
-                    data: abi.encodeCall(this.proxy, data),
+                    data: encryptCallData(abi.encodeCall(this.proxy, data)),
                     chainId: block.chainid
                 })
             );
diff --git a/examples/onchain-signer/test/CommentBox.ts b/examples/onchain-signer/test/CommentBox.ts
index 5699a23e..48136601 100644
--- a/examples/onchain-signer/test/CommentBox.ts
+++ b/examples/onchain-signer/test/CommentBox.ts
@@ -56,7 +56,7 @@ describe('CommentBox', function () {
     const provider = ethers.provider;
 
     // You can set up sapphire-localnet image and run the test like this:
-    // docker run -it -p8545:8545 -p8546:8546 ghcr.io/oasisprotocol/sapphire-localnet -to 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266
+    // docker run -it -p8544-8548:8544-8548 ghcr.io/oasisprotocol/sapphire-localnet
     // npx hardhat test --grep proxy --network sapphire-localnet
     const chainId = (await provider.getNetwork()).chainId;
     if (chainId == BigInt(1337)) {