diff --git a/configuration/networks/hardhat/configuration.js b/configuration/networks/hardhat/configuration.js
index 8064363..809840a 100644
--- a/configuration/networks/hardhat/configuration.js
+++ b/configuration/networks/hardhat/configuration.js
@@ -3,6 +3,7 @@ module.exports = {
     repairRewardPercentage: 10,
     maxNumberOfSlashes: 2,
     slashPercentage: 20,
+    validatorRewardPercentage: 20, // percentage of the slashed amount going to the validators
   },
   proofs: {
     // period has to be less than downtime * blocktime
diff --git a/contracts/Requests.sol b/contracts/Requests.sol
index 103320f..aca6ef4 100644
--- a/contracts/Requests.sol
+++ b/contracts/Requests.sol
@@ -23,7 +23,7 @@ struct Ask {
 }
 
 struct Content {
-  string cid; // content id, used to download the dataset
+  bytes cid; // content id, used to download the dataset
   bytes32 merkleRoot; // merkle root of the dataset, used to verify storage proofs
 }
 
diff --git a/test/Marketplace.test.js b/test/Marketplace.test.js
index d6170b0..c890300 100644
--- a/test/Marketplace.test.js
+++ b/test/Marketplace.test.js
@@ -279,7 +279,7 @@ describe("Marketplace", function () {
     })
 
     it("is rejected when cid is missing", async function () {
-      request.content.cid = ""
+      request.content.cid = []
       await expect(marketplace.requestStorage(request)).to.be.revertedWith(
         "Marketplace_InvalidCid"
       )
diff --git a/test/examples.js b/test/examples.js
index 4f27b3b..ba84e9a 100644
--- a/test/examples.js
+++ b/test/examples.js
@@ -34,7 +34,7 @@ const exampleRequest = async () => {
       collateralPerByte: 1,
     },
     content: {
-      cid: "zb2rhheVmk3bLks5MgzTqyznLu1zqGH5jrfTA1eAZXrjx7Vob",
+      cid: Buffer.from("zb2rhheVmk3bLks5MgzTqyznLu1zqGH5jrfTA1eAZXrjx7Vob"),
       merkleRoot: Array.from(randomBytes(32)),
     },
     expiry: hours(1),
diff --git a/test/ids.js b/test/ids.js
index af3dada..549daa1 100644
--- a/test/ids.js
+++ b/test/ids.js
@@ -3,7 +3,7 @@ const { keccak256, defaultAbiCoder } = ethers.utils
 
 function requestId(request) {
   const Ask = "tuple(int64, uint256, uint256, uint256, uint256, uint256, int64)"
-  const Content = "tuple(string, bytes32)"
+  const Content = "tuple(bytes, bytes32)"
   const Request =
     "tuple(address, " + Ask + ", " + Content + ", uint256, bytes32)"
   return keccak256(defaultAbiCoder.encode([Request], requestToArray(request)))