diff --git a/CMakeLists.txt b/CMakeLists.txt
index 279a65d5..4df202b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,7 +128,7 @@ else( WIN32 ) # Apple AND Linux
     endif( APPLE )
 
     if( "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" )
-        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-builtin-memcmp -Wno-parentheses -Wno-terminate -Wno-invalid-offsetof" )
+        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-builtin-memcmp -Wno-parentheses -Wno-terminate -Wno-invalid-offsetof -Wno-sign-compare" )
     elseif( "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" )
         if( CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.0.0 OR CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.0.0 )
             set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-invalid-partial-specialization" )
diff --git a/libraries/app/api.cpp b/libraries/app/api.cpp
index c76fa940..1e876634 100644
--- a/libraries/app/api.cpp
+++ b/libraries/app/api.cpp
@@ -190,7 +190,7 @@ namespace graphene { namespace app {
     fc::variant network_broadcast_api::broadcast_transaction_synchronous(const signed_transaction& trx)
     {
        _app.chain_database()->check_tansaction_for_duplicated_operations(trx);
-        
+
        fc::promise<fc::variant>::ptr prom( new fc::promise<fc::variant>() );
        broadcast_transaction_with_callback( [=]( const fc::variant& v ){
         prom->set_value(v);
@@ -639,7 +639,7 @@ namespace graphene { namespace app {
        try {
          account = database_api.get_account_id_from_string(account_id_or_name);
        } catch (...) { return result; }
-       
+
        const auto& stats = account(db).statistics(db);
        if( stats.most_recent_op == account_transaction_history_id_type() ) return result;
        const account_transaction_history_object* node = &stats.most_recent_op(db);
@@ -676,7 +676,7 @@ namespace graphene { namespace app {
        FC_ASSERT( limit <= api_limit_get_relative_account_history,
             "Number of querying accounts can not be greater than ${configured_limit}",
             ("configured_limit", api_limit_get_relative_account_history) );
-            
+
        vector<operation_history_object> result;
        account_id_type account;
        try {
@@ -806,7 +806,7 @@ namespace graphene { namespace app {
     }
 
     // asset_api
-    asset_api::asset_api(graphene::app::application& app) : 
+    asset_api::asset_api(graphene::app::application& app) :
          _app(app),
           _db( *app.chain_database()),
           database_api( std::ref(*app.chain_database())) { }
diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index 61b11475..95303223 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -245,7 +245,7 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       uint32_t api_limit_lookup_committee_member_accounts = 1000;
       uint32_t api_limit_get_trade_history = 100;
       uint32_t api_limit_get_trade_history_by_sequence = 100;
-      
+
       // Account Role
       vector<account_role_object> get_account_roles_by_owner(account_id_type owner) const;
 
@@ -928,7 +928,7 @@ vector<asset> database_api::get_account_balances(const std::string& account_name
    return my->get_account_balances( account_name_or_id, assets );
 }
 
-vector<asset> database_api_impl::get_account_balances( const std::string& account_name_or_id, 
+vector<asset> database_api_impl::get_account_balances( const std::string& account_name_or_id,
                                                        const flat_set<asset_id_type>& assets)const
 {
    const account_object* account = get_account_from_string(account_name_or_id);
@@ -2602,9 +2602,9 @@ graphene::app::gpos_info database_api_impl::get_gpos_info(const account_id_type
                         && balance.balance.asset_id == asset_id_type())
                         account_vbos.emplace_back(balance);
                   });
-                  
+
    share_type allowed_withdraw_amount = 0, account_vested_balance = 0;
-   
+
    for (const vesting_balance_object& vesting_balance_obj : account_vbos)
    {
       account_vested_balance += vesting_balance_obj.balance.amount;
diff --git a/libraries/chain/hardfork.d/SON.hf b/libraries/chain/hardfork.d/SON.hf
index b3947a75..5cc86af6 100644
--- a/libraries/chain/hardfork.d/SON.hf
+++ b/libraries/chain/hardfork.d/SON.hf
@@ -1,7 +1,5 @@
-// SON HARDFORK Wednesday, January 1, 2020 12:00:00 AM - 1577836800
-// SON HARDFORK Monday, March 30, 2020 3:00:00 PM - 1585573200
-// SON HARDFORK Monday, September 21, 2020 1:43:11 PM - 1600695791
+// SON HARDFORK Wednesday, October 28, 2020 0:00:00 GMT
 #ifndef HARDFORK_SON_TIME
 #include <ctime>
-#define HARDFORK_SON_TIME (fc::time_point_sec( 1585573200 ))
+#define HARDFORK_SON_TIME (fc::time_point_sec( 1603843200 ))
 #endif