diff --git a/libraries/cli/include/cli/config_jsons/testnet/testnet_genesis.json b/libraries/cli/include/cli/config_jsons/testnet/testnet_genesis.json
index f4d3047376..0bade2bd60 100644
--- a/libraries/cli/include/cli/config_jsons/testnet/testnet_genesis.json
+++ b/libraries/cli/include/cli/config_jsons/testnet/testnet_genesis.json
@@ -144,7 +144,7 @@
     },
     "aspen_hf": {
       "block_num_part_one": 1000,
-      "block_num_part_two": 405809,
+      "block_num_part_two": 421500,
       "max_supply": "0x26C62AD77DC602DAE0000000",
       "generated_rewards": "0x1E1816CD2C7C0C7EA"
     }