diff --git a/assets/chains.json b/assets/chains.json
index 49d091e..dd01279 100644
--- a/assets/chains.json
+++ b/assets/chains.json
@@ -1455,7 +1455,7 @@
     "42429": {
       "internalId": "TempoTestnet",
       "name": "tempo-testnet",
-      "averageBlocktimeHint": 400,
+      "averageBlocktimeHint": 500,
       "isLegacy": false,
       "supportsShanghai": false,
       "isTestnet": true,
diff --git a/src/named.rs b/src/named.rs
index afa0662..be14f57 100644
--- a/src/named.rs
+++ b/src/named.rs
@@ -887,13 +887,13 @@ impl NamedChain {
 
             Sonic | SonicTestnet => 1_000,
 
-            TelosEvm | TelosEvmTestnet => 500,
+            TelosEvm | TelosEvmTestnet | TempoTestnet => 500,
 
             UnichainSepolia | Unichain => 1_000,
 
             BerachainBepolia | Berachain => 2_000,
 
-            Monad | MonadTestnet | TempoTestnet => 400,
+            Monad | MonadTestnet => 400,
 
             Hyperliquid => 2_000,