diff --git a/src/currency_core/currency_config.h b/src/currency_core/currency_config.h
index 6b3974d7..c1335126 100644
--- a/src/currency_core/currency_config.h
+++ b/src/currency_core/currency_config.h
@@ -264,10 +264,10 @@
 #define BLOCK_MINOR_VERSION_GENESIS                     0
 #define BLOCK_MAJOR_VERSION_INITIAL                     0
 #ifndef TESTNET
-#define ZANO_HARDFORK_01_AFTER_HEIGHT                   194624
-#define ZANO_HARDFORK_02_AFTER_HEIGHT                   999999
-#define ZANO_HARDFORK_03_AFTER_HEIGHT                   1082577
-#define ZANO_HARDFORK_04_AFTER_HEIGHT                   999999999
+#define ZANO_HARDFORK_01_AFTER_HEIGHT                   194624    // 2019-09-21 20:25:16
+#define ZANO_HARDFORK_02_AFTER_HEIGHT                   999999    // 2021-04-05 09:11:45
+#define ZANO_HARDFORK_03_AFTER_HEIGHT                   1082577   // 2021-06-01 23:28:10
+#define ZANO_HARDFORK_04_AFTER_HEIGHT                   2555000   // 2024-03-21 10:16:46 (expected)
 #else
 /////// Zarcanum Testnet //////////////////////////////
 #define ZANO_HARDFORK_01_AFTER_HEIGHT                   0