diff --git a/apps/fortuna/Cargo.lock b/apps/fortuna/Cargo.lock
index cd79da2e0d..f68ab3d605 100644
--- a/apps/fortuna/Cargo.lock
+++ b/apps/fortuna/Cargo.lock
@@ -1488,7 +1488,7 @@ dependencies = [
 
 [[package]]
 name = "fortuna"
-version = "5.4.3"
+version = "5.4.4"
 dependencies = [
  "anyhow",
  "axum",
diff --git a/apps/fortuna/Cargo.toml b/apps/fortuna/Cargo.toml
index df4fe5c9ef..bbeef890bf 100644
--- a/apps/fortuna/Cargo.toml
+++ b/apps/fortuna/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name    = "fortuna"
-version = "5.4.3"
+version = "5.4.4"
 edition = "2021"
 
 [dependencies]
diff --git a/apps/fortuna/src/chain/ethereum.rs b/apps/fortuna/src/chain/ethereum.rs
index 28b6387351..eaddab61a8 100644
--- a/apps/fortuna/src/chain/ethereum.rs
+++ b/apps/fortuna/src/chain/ethereum.rs
@@ -102,13 +102,10 @@ impl SignablePythContract {
     ) -> Result<SignablePythContract> {
         let provider = Provider::<Http>::try_from(&chain_config.geth_rpc_addr)?;
         let chain_id = provider.get_chainid().await?;
-        let eip1559_supported = !provider
-            .get_block(ethers::prelude::BlockNumber::Latest)
-            .await?
-            .ok_or_else(|| anyhow!("Latest block not found"))?
-            .base_fee_per_gas
-            .unwrap_or(U256::zero())
-            .is_zero(); // sei testnet returns 0 instead of None
+        let eip1559_supported = match provider.estimate_eip1559_fees(None).await {
+            Ok((max_fee, max_priority_fee)) => !max_fee.is_zero() && !max_priority_fee.is_zero(),
+            Err(_) => false,
+        };
         let gas_oracle = EthProviderOracle::new(provider.clone());
         let transformer = LegacyTxTransformer {
             use_legacy_tx: !eip1559_supported,
diff --git a/contract_manager/scripts/latency_entropy_with_callback.ts b/contract_manager/scripts/latency_entropy_with_callback.ts
index 3bca6a5fcf..d6c6e64de7 100644
--- a/contract_manager/scripts/latency_entropy_with_callback.ts
+++ b/contract_manager/scripts/latency_entropy_with_callback.ts
@@ -54,12 +54,13 @@ async function testLatency(
 
   const startTime = Date.now();
 
-  let fromBlock = requestResponse.blockNumber;
+  const fromBlock = requestResponse.blockNumber;
   const web3 = new Web3(contract.chain.getRpcUrl());
   const entropyContract = contract.getContract();
 
   // eslint-disable-next-line no-constant-condition
   while (true) {
+    await new Promise((resolve) => setTimeout(resolve, 1000));
     const currentBlock = await web3.eth.getBlockNumber();
 
     if (fromBlock > currentBlock) {
@@ -70,7 +71,6 @@ async function testLatency(
       fromBlock: fromBlock,
       toBlock: currentBlock,
     });
-    fromBlock = currentBlock + 1;
 
     const event = events.find(
       (event) => event.returnValues.request[1] == sequenceNumber
@@ -87,8 +87,10 @@ async function testLatency(
       );
       break;
     }
-
-    await new Promise((resolve) => setTimeout(resolve, 300));
+    if (Date.now() - startTime > 60000) {
+      console.log("Timeout: 60s passed without the callback being called.");
+      break;
+    }
   }
 }