diff --git a/src/config.ts b/src/config.ts
index f5100770..1dfabe7e 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -55,6 +55,19 @@ export const semaphoreEthersChain = (): string => {
   }
 };
 
+/**
+ * Get the RPC URL based on the network we are connected to
+ * @returns the alchemy RPC URL
+ */
+export const getRPCURL = (): string | undefined => {
+  switch (process.env.NEXT_PUBLIC_CHAIN_NAME) {
+    case "optimismSepolia":
+      return `https://opt-sepolia.g.alchemy.com/v2/${process.env.NEXT_PUBLIC_ALCHEMY_ID!}`;
+    default:
+      return undefined;
+  }
+};
+
 export const config = {
   logoUrl: "/Logo.svg",
   pageSize: 3 * 4,
diff --git a/src/features/applications/components/ImpactTags.tsx b/src/features/applications/components/ImpactTags.tsx
index a40c0cba..aa08efab 100644
--- a/src/features/applications/components/ImpactTags.tsx
+++ b/src/features/applications/components/ImpactTags.tsx
@@ -14,7 +14,6 @@ export const ImpactTags = (): JSX.Element => {
     control,
   });
 
-  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
   const selected = watch("impactCategory") ?? [];
 
   const error = formState.errors.impactCategory;
diff --git a/src/providers/index.tsx b/src/providers/index.tsx
index b412660c..aa45e622 100644
--- a/src/providers/index.tsx
+++ b/src/providers/index.tsx
@@ -63,9 +63,7 @@ function createWagmiConfig() {
     ssr: false,
     chains: activeChains as unknown as readonly [Chain, ...Chain[]],
     transports: {
-      [appConfig.config.network.id]: http(
-        `https://opt-sepolia.g.alchemy.com/v2/${process.env.NEXT_PUBLIC_ALCHEMY_ID!}`,
-      ),
+      [appConfig.config.network.id]: http(appConfig.getRPCURL()),
     },
   });
 
diff --git a/src/utils/semaphore.ts b/src/utils/semaphore.ts
index b660e489..49ad980b 100644
--- a/src/utils/semaphore.ts
+++ b/src/utils/semaphore.ts
@@ -3,7 +3,7 @@ import { SemaphoreEthers } from "@semaphore-protocol/data";
 import { AbiCoder, JsonRpcSigner } from "ethers";
 import { getSemaphoreGatekeeperData } from "maci-cli/sdk";
 
-import { config, semaphoreEthersChain } from "~/config";
+import { config, getRPCURL, semaphoreEthersChain } from "~/config";
 
 /**
  * Encodes the Semaphore Proof to be sent on chain
@@ -33,7 +33,7 @@ export const getSemaphoreProof = async (signer: JsonRpcSigner, identity: Identit
     maciAddress: config.maciAddress!,
   });
 
-  const semaphore = new SemaphoreEthers(semaphoreEthersChain(), {
+  const semaphore = new SemaphoreEthers(getRPCURL() ?? semaphoreEthersChain(), {
     address: semaphoreContractAddress,
   });