diff --git a/packages/alchemy/src/chains.ts b/packages/alchemy/src/chains.ts
index 7664630525..695b9ba5c3 100644
--- a/packages/alchemy/src/chains.ts
+++ b/packages/alchemy/src/chains.ts
@@ -40,8 +40,16 @@ export const ChainFeeStrategies: Map<number, GasFeeMode> = new Map<
   defineChainStrategy(goerli.id, GasFeeStrategy.FIXED, 0n),
   defineChainStrategy(sepolia.id, GasFeeStrategy.FIXED, 0n),
   defineChainStrategy(polygonMumbai.id, GasFeeStrategy.FIXED, 0n),
-  defineChainStrategy(optimismGoerli.id, GasFeeStrategy.FIXED, 0n),
-  defineChainStrategy(arbitrumGoerli.id, GasFeeStrategy.FIXED, 0n),
+  defineChainStrategy(
+    optimismGoerli.id,
+    GasFeeStrategy.BASE_FEE_PERCENTAGE,
+    0n
+  ),
+  defineChainStrategy(
+    arbitrumGoerli.id,
+    GasFeeStrategy.BASE_FEE_PERCENTAGE,
+    0n
+  ),
   // mainnets
   defineChainStrategy(mainnet.id, GasFeeStrategy.PRIORITY_FEE_PERCENTAGE, 57n),
   defineChainStrategy(polygon.id, GasFeeStrategy.PRIORITY_FEE_PERCENTAGE, 25n),