diff --git a/engine/src/eth/rpc.rs b/engine/src/eth/rpc.rs
index 3329aca7c1..25c9d412e0 100644
--- a/engine/src/eth/rpc.rs
+++ b/engine/src/eth/rpc.rs
@@ -272,7 +272,7 @@ mod tests {
 		println!("{:?}", block_with_txs);
 
 		let fee_history = client
-			.fee_history(10.into(), BlockNumber::Latest, &[0.1, 0.5, 0.9])
+			.fee_history(10.into(), BlockNumber::Latest, &[10.0, 50.0, 90.0])
 			.await
 			.unwrap();
 		println!("{:?}", fee_history);
diff --git a/engine/src/witness/eth/eth_chain_tracking.rs b/engine/src/witness/eth/eth_chain_tracking.rs
index 47417fe6b5..79b8b1a1b9 100644
--- a/engine/src/witness/eth/eth_chain_tracking.rs
+++ b/engine/src/witness/eth/eth_chain_tracking.rs
@@ -15,13 +15,9 @@ impl<T: EthersRetryRpcApi + Send + Sync + Clone> GetTrackedData<cf_chains::Ether
 		&self,
 		header: &Header<<cf_chains::Ethereum as cf_chains::Chain>::ChainBlockNumber, H256, Bloom>,
 	) -> Result<<cf_chains::Ethereum as cf_chains::Chain>::TrackedData, anyhow::Error> {
-		let priority_fee_percentile = 50u8;
+		const PRIORITY_FEE_PERCENTILE: f64 = 50.0;
 		let fee_history = self
-			.fee_history(
-				U256::one(),
-				header.index.into(),
-				vec![priority_fee_percentile as f64 / 100_f64],
-			)
+			.fee_history(U256::one(), header.index.into(), vec![PRIORITY_FEE_PERCENTILE])
 			.await;
 
 		Ok(EthereumTrackedData {