diff --git a/src/vendors/ethers/utils/gas-limit.ts b/src/vendors/ethers/utils/gas-limit.ts
index b351894..8282849 100644
--- a/src/vendors/ethers/utils/gas-limit.ts
+++ b/src/vendors/ethers/utils/gas-limit.ts
@@ -1,10 +1,10 @@
 import { ethers } from 'ethers';
 
 /**
- * This value has been calculated as the difference between estimated gas with caching on a single block
- * and actual gas without caching on multiple blocks.
+ * This value has been determined after testing all `order - fill` pairings and recording the difference
+ * between `ethers`' `estimateGas` and the tx's `gasUsed`.
  */
-const GAS_LIMIT_DELTA = ethers.BigNumber.from('15000');
+const GAS_LIMIT_DELTA = ethers.BigNumber.from('26000');
 
 /**
  * Calculates a higher gas limit to prevent out-of-gas errors in certain situations.
diff --git a/test/vendors/ethers/utils/gas-limit.spec.ts b/test/vendors/ethers/utils/gas-limit.spec.ts
index 2df97b8..8391fb6 100644
--- a/test/vendors/ethers/utils/gas-limit.spec.ts
+++ b/test/vendors/ethers/utils/gas-limit.spec.ts
@@ -11,6 +11,6 @@ describe('vendors/ethers/utils/gas-limit', () => {
 
         assert.strictEqual(limit._isBigNumber, true, 'should create a BigNumber instance');
         assert.strictEqual(limit.gt(estimated), true, 'the limit should be greater than the estimate');
-        assert.strictEqual(limit.toNumber(), estimated.toNumber() + 15000, 'the limit should be 15k greater than the estimate');
+        assert.strictEqual(limit.toNumber(), estimated.toNumber() + 26000, 'the limit should be 26k greater than the estimate');
     });
 });