diff --git a/src/components/bounty/BountyInfo.tsx b/src/components/bounty/BountyInfo.tsx
index b6a7530..194f66e 100644
--- a/src/components/bounty/BountyInfo.tsx
+++ b/src/components/bounty/BountyInfo.tsx
@@ -39,6 +39,12 @@ export default function BountyInfo({ bountyId }: { bountyId: string }) {
 
   const signMutation = useMutation({
     mutationFn: async (bountyId: string) => {
+      //arbitrum has a problem with message signing, so all confirmations are on base
+      const chainId = await account.connector?.getChainId();
+      if (chainId !== 8453) {
+        await switctChain.switchChainAsync({ chainId: 8453 });
+      }
+
       const message =
         getBanSignatureFirstLine({
           id: Number(bountyId),
diff --git a/src/components/bounty/ClaimItem.tsx b/src/components/bounty/ClaimItem.tsx
index 8feb5d3..6b1a297 100644
--- a/src/components/bounty/ClaimItem.tsx
+++ b/src/components/bounty/ClaimItem.tsx
@@ -47,6 +47,11 @@ export default function ClaimItem({
 
   const signMutation = useMutation({
     mutationFn: async (claimId: string) => {
+      const chainId = await account.connector?.getChainId();
+      if (chainId !== 8453) {
+        //arbitrum has a problem with message signing, so all confirmations are on base
+        await switctChain.switchChainAsync({ chainId: 8453 });
+      }
       const message = getBanSignatureFirstLine({
         id: Number(claimId),
         chainId: chain.id,
diff --git a/src/trpc/routers/_app.ts b/src/trpc/routers/_app.ts
index 9bee49f..55c4621 100644
--- a/src/trpc/routers/_app.ts
+++ b/src/trpc/routers/_app.ts
@@ -527,7 +527,7 @@ export const appRouter = createTRPCRouter({
       }
 
       const isAdmin = checkIsAdmin(input.address);
-      const chain = chains[input.chainName];
+      const chain = chains['base'];
 
       if (!isAdmin) {
         throw new TRPCError({