diff --git a/config.json b/config.json
index 275fab9..658fb27 100644
--- a/config.json
+++ b/config.json
@@ -46,28 +46,28 @@
         "sslCA": "chain.pem",
         "ports": [
             {
-                "port": 3336,
-                "difficulty": 50000000,
+                "port": 5555,
+                "difficulty": 50000,
                 "desc": "Low end hardware"
             },
             {
-                "port": 3337,
-                "difficulty": 600000000,
-                "desc": "middle end hardware"
+                "port": 7777,
+                "difficulty": 500000,
+                "desc": "Mid/high end hardware"
             },
             {
-                "port": 3338,
-                "difficulty": 5000000000,
+                "port": 8888,
+                "difficulty": 5000000,
                 "desc": "Nicehash, MRR"
             }
         ],
         "varDiff": {
-            "minDiff": 50000000,
-            "maxDiff": 5000000000,
+            "minDiff": 10000,
+            "maxDiff": 5000000,
             "targetTime": 45,
             "retargetTime": 60,
-            "variancePercent": 5,
-            "maxJump": 20
+            "variancePercent": 30,
+            "maxJump": 100
         },
         "paymentId": {
             "addressSeparator": "+"
@@ -158,7 +158,7 @@
     "redis": {
         "host": "127.0.0.1",
         "port": 6379,
-        "auth": null,
+        "auth": "changeme",
         "db": 11,
         "cleanupInterval": 15
     },
diff --git a/lib/pool.js b/lib/pool.js
index 91ee9da..5da50ab 100644
--- a/lib/pool.js
+++ b/lib/pool.js
@@ -16,10 +16,8 @@ let apiInterfaces = require('./apiInterfaces.js')(config.daemon, config.wallet,
 let notifications = require('./notifications.js');
 let utils = require('./utils.js');
 
-config.hashingUtil = config.hashingUtil || false;
-let cnHashing = require('cryptonight-hashing');
-if (config.hashingUtil)
-    cnHashing = require('turtlecoin-multi-hashing');
+// Lethean uses ProgPoWZ via zano-node-util — no separate CryptoNight hashing needed
+let cnHashing = null;
 
 // Set nonce pattern - must exactly be 8 hex chars
 let noncePattern = new RegExp("^[0-9A-Fa-f]{16}$");
@@ -42,12 +40,8 @@ let cnAlgorithm = config.cnAlgorithm || "cryptonight";
 let cnVariant = config.cnVariant || 0;
 let cnBlobType = config.cnBlobType || 0;
 
-let cryptoNight;
-if (!cnHashing || !cnHashing[cnAlgorithm]) {
-    log('error', logSystem, 'Invalid cryptonight algorithm: %s', [cnAlgorithm]);
-} else {
-    cryptoNight = cnHashing[cnAlgorithm];
-}
+// ProgPoWZ: hashing done through zano-node-util get_pow_hash — no CryptoNight needed
+let cryptoNight = null;
 
 // Set instance id
 let instanceId = utils.instanceId();
diff --git a/lib/utils.js b/lib/utils.js
index 073b9a6..de839e2 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -22,11 +22,16 @@ exports.instanceId = function(size=4) {
 }
 
 /**
- * Validate miner address
+ * Validate miner address — Lethean uses native is_address_valid
  **/
-let addressBase58Prefix = parseInt(cnUtil.address_decode(Buffer.from(config.poolServer.poolAddress)).toString());
-let integratedAddressBase58Prefix = config.poolServer.intAddressPrefix ? parseInt(config.poolServer.intAddressPrefix) : addressBase58Prefix + 1;
-let subAddressBase58Prefix = config.poolServer.subAddressPrefix ? parseInt(config.poolServer.subAddressPrefix) : "N/A";
+let addressBase58Prefix = null;
+try {
+    let decoded = cnUtil.address_decode(Buffer.from(config.poolServer.poolAddress));
+    if (typeof decoded === 'number') addressBase58Prefix = decoded;
+    else if (Buffer.isBuffer(decoded) && decoded.length >= 8) addressBase58Prefix = decoded.readUInt32BE(4);
+} catch(e) {}
+let integratedAddressBase58Prefix = config.poolServer.intAddressPrefix ? parseInt(config.poolServer.intAddressPrefix) : (addressBase58Prefix ? addressBase58Prefix + 1 : null);
+let subAddressBase58Prefix = config.poolServer.subAddressPrefix ? parseInt(config.poolServer.subAddressPrefix) : null;
 
 // Get address prefix
 function getAddressPrefix(address) {
diff --git a/package.json b/package.json
index a33e484..e8ea233 100644
--- a/package.json
+++ b/package.json
@@ -13,8 +13,7 @@
         "base58-native": "*",
         "bignum": "*",
         "cli-color": "*",
-        "cryptoforknote-util": "git+https://forge.lthn.ai/lthn/lethean-node-util.git",
-        "cryptonight-hashing": "git+https://github.com/MoneroOcean/node-cryptonight-hashing.git",
+        "cryptoforknote-util": "file:../zano-node-util",
         "dateformat": "^4.5.1",
         "mailgun.js": "*",
         "node-telegram-bot-api": "*",