diff --git a/src/custom.d.ts b/src/custom.d.ts
index 44c8875..4e475fb 100644
--- a/src/custom.d.ts
+++ b/src/custom.d.ts
@@ -4,6 +4,7 @@ type MempoolFeeEstimates = {
   halfHourFee: number;
   hourFee: number;
   economyFee: number;
+  minimumFee: number;
 };
 
 type EsploraFeeEstimates = {
diff --git a/src/server.tsx b/src/server.tsx
index 4f258bd..0124e4e 100644
--- a/src/server.tsx
+++ b/src/server.tsx
@@ -158,7 +158,7 @@ function assignResults(results: PromiseSettledResult<any>[]) {
  */
 function calculateFees(mempoolFeeEstimates: MempoolFeeEstimates | null | undefined, esploraFeeEstimates: EsploraFeeEstimates | null | undefined) {
   let feeByBlockTarget: FeeByBlockTarget = {};
-  const minFee = mempoolFeeEstimates?.economyFee;
+  const minFee = mempoolFeeEstimates?.minimumFee;
 
   if (mempoolFeeEstimates) {
     const blockTargetMapping: BlockTargetMapping = {