diff --git a/genesis.json b/genesis.json
index 55dd9c2c..e5b89c42 100644
--- a/genesis.json
+++ b/genesis.json
@@ -258,6 +258,9 @@
     "maximum_tournament_start_time_in_future": 5184000,
     "maximum_tournament_start_delay": 259200,
     "maximum_tournament_number_of_wins": 25,
+    "gpos_period": 15552000,
+    "gpos_subperiod": 2592000,
+    "gpos_period_start": "2019-02-01T00:00:00",
     "extensions": []
   },
   "initial_bts_accounts": [],
diff --git a/libraries/chain/hardfork.d/GPOS.hf b/libraries/chain/hardfork.d/GPOS.hf
index c9855f5d..3137123f 100644
--- a/libraries/chain/hardfork.d/GPOS.hf
+++ b/libraries/chain/hardfork.d/GPOS.hf
@@ -1,4 +1,4 @@
-// GPOS HARDFORK Saturday, January 5, 2019 4:39:39 PM
+// GPOS HARDFORK Friday, February 1, 2019 12:00:00 AM
 #ifndef HARDFORK_GPOS_TIME
-#define HARDFORK_GPOS_TIME (fc::time_point_sec( 1546706379 ))
+#define HARDFORK_GPOS_TIME (fc::time_point_sec( 1548979200 ))
 #endif
\ No newline at end of file
diff --git a/tests/tests/gpos_tests.cpp b/tests/tests/gpos_tests.cpp
index b154eaf4..ebae4c6b 100644
--- a/tests/tests/gpos_tests.cpp
+++ b/tests/tests/gpos_tests.cpp
@@ -707,13 +707,13 @@ BOOST_AUTO_TEST_CASE( competing_proposals )
 
       // only w2 is getting paid as it haves more votes and money is only enough for 1
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 73488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 100000000000);
 
       generate_blocks(db.get_dynamic_global_properties().next_maintenance_time);
       generate_block();
 
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 123488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 150000000000);
 
       generate_blocks(db.get_dynamic_global_properties().next_maintenance_time);
       generate_block();
@@ -726,7 +726,7 @@ BOOST_AUTO_TEST_CASE( competing_proposals )
       BOOST_CHECK_EQUAL(w2.total_votes_for, 150);
 
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 173488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 200000000000);
 
       generate_blocks(db.get_dynamic_global_properties().next_maintenance_time);
       generate_block();
@@ -739,7 +739,7 @@ BOOST_AUTO_TEST_CASE( competing_proposals )
 
       // worker is sil getting paid as days pass
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 223488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 250000000000);
 
       generate_blocks(db.get_dynamic_global_properties().next_maintenance_time);
       generate_block();
@@ -751,7 +751,7 @@ BOOST_AUTO_TEST_CASE( competing_proposals )
       BOOST_CHECK_EQUAL(w2.total_votes_for, 50);
 
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 273488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 300000000000);
 
       generate_blocks(db.get_dynamic_global_properties().next_maintenance_time);
       generate_block();
@@ -764,7 +764,7 @@ BOOST_AUTO_TEST_CASE( competing_proposals )
       BOOST_CHECK_EQUAL(w2.total_votes_for, 0);
 
       BOOST_CHECK_EQUAL(w1.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 0);
-      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 273488756706);
+      BOOST_CHECK_EQUAL(w2.worker.get<vesting_balance_worker_type>().balance(db).balance.amount.value, 300000000000);
    }
    catch (fc::exception &e) {
       edump((e.to_detail_string()));