diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 5c9efb276..177d7604f 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -276,6 +276,11 @@ void *chainparams_commandline(void *ptr)
     //fprintf(stderr,">>>>>>>> port.%u\n",ASSETCHAINS_P2PPORT);
     if ( ASSETCHAINS_SYMBOL[0] != 0 )
     {
+        if ( ASSETCHAINS_BLOCKTIME != 60 )
+        {
+            consensus.nMaxFutureBlockTime = 7 * ASSETCHAINS_BLOCKTIME; // 7 blocks
+            consensus.nPowTargetSpacing = ASSETCHAINS_BLOCKTIME;
+        }
         mainParams.SetDefaultPort(ASSETCHAINS_P2PPORT);
         if ( ASSETCHAINS_RPCPORT == 0 )
             ASSETCHAINS_RPCPORT = ASSETCHAINS_P2PPORT + 1;
diff --git a/src/komodo_defs.h b/src/komodo_defs.h
index 0ea97d6db..9f33c6036 100644
--- a/src/komodo_defs.h
+++ b/src/komodo_defs.h
@@ -38,7 +38,7 @@ extern uint8_t ASSETCHAINS_TXPOW,ASSETCHAINS_PUBLIC;
 int32_t MAX_BLOCK_SIZE(int32_t height);
 extern char ASSETCHAINS_SYMBOL[KOMODO_ASSETCHAIN_MAXLEN];
 extern uint16_t ASSETCHAINS_P2PPORT,ASSETCHAINS_RPCPORT;
-extern uint32_t ASSETCHAIN_INIT, ASSETCHAINS_MAGIC;
+extern uint32_t ASSETCHAIN_INIT, ASSETCHAINS_MAGIC,ASSETCHAINS_BLOCKTIME;
 extern int32_t VERUS_BLOCK_POSUNITS, ASSETCHAINS_LWMAPOS, ASSETCHAINS_SAPLING, ASSETCHAINS_OVERWINTER;
 extern uint64_t ASSETCHAINS_SUPPLY;
 
diff --git a/src/komodo_globals.h b/src/komodo_globals.h
index c85c68451..8215a6b6e 100644
--- a/src/komodo_globals.h
+++ b/src/komodo_globals.h
@@ -69,7 +69,7 @@ int64_t MAX_MONEY = 200000000 * 100000000LL;
 uint64_t ASSETCHAINS_TIMELOCKGTE = _ASSETCHAINS_TIMELOCKOFF;
 uint64_t ASSETCHAINS_TIMEUNLOCKFROM = 0, ASSETCHAINS_TIMEUNLOCKTO = 0;
 
-uint32_t ASSETCHAINS_LASTERA = 1;
+uint32_t ASSETCHAINS_BLOCKTIME = 60,ASSETCHAINS_LASTERA = 1;
 uint64_t ASSETCHAINS_ENDSUBSIDY[ASSETCHAINS_MAX_ERAS],ASSETCHAINS_REWARD[ASSETCHAINS_MAX_ERAS],ASSETCHAINS_HALVING[ASSETCHAINS_MAX_ERAS],ASSETCHAINS_DECAY[ASSETCHAINS_MAX_ERAS];
 uint8_t ASSETCHAINS_CCDISABLES[256];
 
diff --git a/src/komodo_utils.h b/src/komodo_utils.h
index f5c92cf84..469cbd21b 100644
--- a/src/komodo_utils.h
+++ b/src/komodo_utils.h
@@ -1707,6 +1707,7 @@ void komodo_args(char *argv0)
     WITNESS_CACHE_SIZE = MAX_REORG_LENGTH+10;
     ASSETCHAINS_CC = GetArg("-ac_cc",0);
     KOMODO_CCACTIVATE = GetArg("-ac_ccactivate",0);
+    ASSETCHAINS_BLOCKTIME = GetArg("-ac_blocktime",60);
     ASSETCHAINS_PUBLIC = GetArg("-ac_public",0);
     ASSETCHAINS_PRIVATE = GetArg("-ac_private",0);
     if ( (KOMODO_REWIND= GetArg("-rewind",0)) != 0 )
@@ -1899,7 +1900,7 @@ void komodo_args(char *argv0)
             fprintf(stderr,"-ac_script and -ac_marmara are mutually exclusive\n");
             exit(0);
         }
-        if ( ASSETCHAINS_ENDSUBSIDY[0] != 0 || ASSETCHAINS_REWARD[0] != 0 || ASSETCHAINS_HALVING[0] != 0 || ASSETCHAINS_DECAY[0] != 0 || ASSETCHAINS_COMMISSION != 0 || ASSETCHAINS_PUBLIC != 0 || ASSETCHAINS_PRIVATE != 0 || ASSETCHAINS_TXPOW != 0 || ASSETCHAINS_FOUNDERS != 0 || ASSETCHAINS_SCRIPTPUB.size() > 1 || ASSETCHAINS_SELFIMPORT.size() > 0 || ASSETCHAINS_OVERRIDE_PUBKEY33[0] != 0 || ASSETCHAINS_TIMELOCKGTE != _ASSETCHAINS_TIMELOCKOFF|| ASSETCHAINS_ALGO != ASSETCHAINS_EQUIHASH || ASSETCHAINS_LWMAPOS != 0 || ASSETCHAINS_LASTERA > 0 || ASSETCHAINS_BEAMPORT != 0 || ASSETCHAINS_CODAPORT != 0 || ASSETCHAINS_MARMARA != 0 || nonz > 0 || ASSETCHAINS_CCLIB.size() > 0 )
+        if ( ASSETCHAINS_ENDSUBSIDY[0] != 0 || ASSETCHAINS_REWARD[0] != 0 || ASSETCHAINS_HALVING[0] != 0 || ASSETCHAINS_DECAY[0] != 0 || ASSETCHAINS_COMMISSION != 0 || ASSETCHAINS_PUBLIC != 0 || ASSETCHAINS_PRIVATE != 0 || ASSETCHAINS_TXPOW != 0 || ASSETCHAINS_FOUNDERS != 0 || ASSETCHAINS_SCRIPTPUB.size() > 1 || ASSETCHAINS_SELFIMPORT.size() > 0 || ASSETCHAINS_OVERRIDE_PUBKEY33[0] != 0 || ASSETCHAINS_TIMELOCKGTE != _ASSETCHAINS_TIMELOCKOFF|| ASSETCHAINS_ALGO != ASSETCHAINS_EQUIHASH || ASSETCHAINS_LWMAPOS != 0 || ASSETCHAINS_LASTERA > 0 || ASSETCHAINS_BEAMPORT != 0 || ASSETCHAINS_CODAPORT != 0 || ASSETCHAINS_MARMARA != 0 || nonz > 0 || ASSETCHAINS_CCLIB.size() > 0 || ASSETCHAINS_BLOCKTIME != 60 )
         {
             fprintf(stderr,"perc %.4f%% ac_pub=[%02x%02x%02x...] acsize.%d\n",dstr(ASSETCHAINS_COMMISSION)*100,ASSETCHAINS_OVERRIDE_PUBKEY33[0],ASSETCHAINS_OVERRIDE_PUBKEY33[1],ASSETCHAINS_OVERRIDE_PUBKEY33[2],(int32_t)ASSETCHAINS_SCRIPTPUB.size());
             extraptr = extrabuf;
@@ -1989,6 +1990,8 @@ void komodo_args(char *argv0)
                 }
                 fprintf(stderr," <- CCLIB name\n");
             }
+            if ( ASSETCHAINS_BLOCKTIME != 60 )
+                extralen += iguana_rwnum(1,&extraptr[extralen],sizeof(ASSETCHAINS_BLOCKTIME),(void *)&ASSETCHAINS_BLOCKTIME);
         }
         
         addn = GetArg("-seednode","");