diff --git a/README.md b/README.md
index 9cd1f673c..9407fa9d4 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@ Dates are provided in the format YYYY-MM-DD.
 | ------------------------------ | -----------| ----------------- | ---------------------- | -------------------------- | ---------------------------------------------------------------------------------- |
 | 1                              | 2018-04-01 | v7                | v0.1.0.0               | v0.1.0.0                  | Cryptonight variant 1, ringsize >= 8, sorted inputs
 | 6969                           | 2018-04-24 | v8                | v0.2.0.0               | v0.2.0.0                  | Bulletproofs, LWMA difficulty algorithm, ringsize >= 10, reduce unlock to 4
-| 56269                          | 2018-10-06 | v9                | v0.3.0.0               | v0.3.0.0                  | Cryptonight variant 2, LWMA v2, ringsize = 22, XXX
+| 53666                          | 2018-10-06 | v9                | v0.3.0.0               | v0.3.0.0                  | Cryptonight variant 2, LWMA v2, ringsize = 22, XXX
 
 X's indicate that these details have not been determined as of commit date.
 
diff --git a/src/cryptonote_config.h b/src/cryptonote_config.h
index f2a92922e..40f637d18 100755
--- a/src/cryptonote_config.h
+++ b/src/cryptonote_config.h
@@ -81,7 +81,7 @@
 #define DIFFICULTY_CUT                                  60  // timestamps to cut after sorting
 #define DIFFICULTY_BLOCKS_COUNT_V2                      DIFFICULTY_WINDOW_V2 + 1 // added +1 to make N=N
 #define DIFFICULTY_BLOCKS_COUNT                         DIFFICULTY_WINDOW + DIFFICULTY_LAG
-#define DIFFICULTY_HEIGHT                               56269 // v9 fork height
+#define DIFFICULTY_HEIGHT                               53666 // v9 fork height
 #define DIFFICULTY_GUESS                                40000000 // difficulty at fork 40m
 #define DIFFICULTY_MINIMUM                              10000000 // minimum difficulty set to 10m
 #define DIFFICULTY_TESTNET_HEIGHT                       100
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 390cdbec1..929f34fe5 100755
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -92,7 +92,7 @@ static const struct {
 //{ 1, 1, 0, 1341378000 },
  { 7, 1, 0, 1519605000 },
  { 8, 6969, 0, 1524214739 },
- { 9, 56269, 0, 1538689773 },
+ { 9, 53666, 0, 1538689773 },
 };
 
 static const uint64_t mainnet_hard_fork_version_1_till = ((uint64_t)(0));