diff --git a/lib/protocol/networks.js b/lib/protocol/networks.js
index 85fd28dd5..c583d3b9f 100644
--- a/lib/protocol/networks.js
+++ b/lib/protocol/networks.js
@@ -205,7 +205,7 @@ main.pow = {
    */
 
   chainwork: new BN(
-    '000000000000000000000000000000000000000000d4800adc35a2748a30dfcf',
+    '000000000000000000000000000000000000000000ddd4a527724e4a8e938b34',
     'hex'
   ),
 
@@ -338,6 +338,12 @@ main.block = {
    */
   greatWallActivationTime: 1557921600,
 
+  /**
+   * Friay, Nov 15, 2019 12:00:00 UTC hard fork
+   */
+
+  gravitonActivationTime: 1573819200,
+
   /**
    * Safe height to start pruning.
    */
@@ -627,7 +633,7 @@ testnet.pow = {
   ),
   bits: 486604799,
   chainwork: new BN(
-    '00000000000000000000000000000000000000000000003e28ffb60a2b69f5f0',
+    '0000000000000000000000000000000000000000000000416ad051088ff75074',
     'hex'
   ),
   targetTimespan: 14 * 24 * 60 * 60,
@@ -658,6 +664,7 @@ testnet.block = {
 
   magneticAnomalyActivationTime: 1542300000,
   greatWallActivationTime: 1557921600,
+  gravitonActivationTime: 1573819200,
 
   pruneAfterHeight: 1000,
   keepBlocks: 10000,
@@ -805,6 +812,7 @@ regtest.block = {
   daaHash: null,
   magneticAnomalyActivationTime: 1542300000,
   greatWallActivationTime: 1557921600,
+  gravitonActivationTime: 1573819200,
   pruneAfterHeight: 1000,
   keepBlocks: 10000,
   maxTipAge: 0xffffffff,
@@ -957,6 +965,7 @@ simnet.block = {
   daaHash: null,
   magneticAnomalyActivationTime: 1542300000,
   greatWallActivationTime: 1557921600,
+  gravitonActivationTime: 1573819200,
   pruneAfterHeight: 1000,
   keepBlocks: 10000,
   maxTipAge: 0xffffffff,