diff --git a/packages/payment-detection/src/erc20/fee-proxy-contract.ts b/packages/payment-detection/src/erc20/fee-proxy-contract.ts
index 27498135da..4fcdc6f832 100644
--- a/packages/payment-detection/src/erc20/fee-proxy-contract.ts
+++ b/packages/payment-detection/src/erc20/fee-proxy-contract.ts
@@ -212,7 +212,10 @@ export default class PaymentNetworkERC20FeeProxyContract<
       throw new NetworkNotSupported(`Payment network not supported by ERC20 payment detection`);
     }
 
-    const deploymentInformation = this.getDeploymentInformation(network, paymentNetwork.version);
+    const deploymentInformation = erc20FeeProxyArtifact.getDeploymentInformation(
+      network,
+      paymentNetwork.version,
+    );
 
     if (!deploymentInformation) {
       throw new VersionNotSupported(
@@ -307,7 +310,4 @@ export default class PaymentNetworkERC20FeeProxyContract<
   get paymentNetworkId(): ExtensionTypes.ID {
     return this._paymentNetworkId;
   }
-
-  protected getDeploymentInformation: DeploymentInformationGetter =
-    erc20FeeProxyArtifact.getDeploymentInformation;
 }
diff --git a/packages/smart-contracts/src/lib/ContractArtifact.ts b/packages/smart-contracts/src/lib/ContractArtifact.ts
index 3ececc047a..2d3821a8a1 100644
--- a/packages/smart-contracts/src/lib/ContractArtifact.ts
+++ b/packages/smart-contracts/src/lib/ContractArtifact.ts
@@ -28,7 +28,14 @@ export type ArtifactInfo<
  * and utilities to connect to it
  **/
 export class ContractArtifact<TContract extends Contract> {
-  constructor(private info: ArtifactInfo<string, string>, private lastVersion: string) {}
+  constructor(private info: ArtifactInfo<string, string>, private lastVersion: string) {
+    this.connect = this.connect.bind(this);
+    this.getInterface = this.getInterface.bind(this);
+    this.getContractAbi = this.getContractAbi.bind(this);
+    this.getAddress = this.getAddress.bind(this);
+    this.getCreationBlockNumber = this.getCreationBlockNumber.bind(this);
+    this.getDeploymentInformation = this.getDeploymentInformation.bind(this);
+  }
 
   /**
    * Returns an ethers contract instance for the given `networkName`