diff --git a/packages/yoroi-extension/app/api/ada/lib/storage/database/prepackaged/networks.js b/packages/yoroi-extension/app/api/ada/lib/storage/database/prepackaged/networks.js
index 015ab85ac4..53cbde7b9f 100644
--- a/packages/yoroi-extension/app/api/ada/lib/storage/database/prepackaged/networks.js
+++ b/packages/yoroi-extension/app/api/ada/lib/storage/database/prepackaged/networks.js
@@ -257,14 +257,14 @@ export const networks = Object.freeze({
       Object.freeze({
         StartAt: 0,
         ChainNetworkId: '0',
-        ByronNetworkId: 1,
-        GenesisDate: '1654041600000',
+        ByronNetworkId: 2,
+        GenesisDate: '1666656000000',
         SlotsPerEpoch: 21600,
         SlotDuration: 20,
       }),
       Object.freeze({
         StartAt: 0,
-        SlotsPerEpoch: 432000,
+        SlotsPerEpoch: 86400,
         SlotDuration: 1,
         PerEpochPercentageReward: 69344,
         LinearFee: {