diff --git a/.env.example b/.env.example
index 010ae42..50b3453 100644
--- a/.env.example
+++ b/.env.example
@@ -8,12 +8,14 @@ BITCOIN_RPC_TIMEOUT=10000
 PORT=3333
 
 #optional telegram bot
-TELEGRAM_BOT_TOKEN=
+#TELEGRAM_BOT_TOKEN=
 
 #optional discord bot
-DISCORD_BOT_CLIENTID=
-DISCORD_BOT_GUILD_ID=
-DISCORD_BOT_CHANNEL_ID=
+#DISCORD_BOT_CLIENTID=
+#DISCORD_BOT_GUILD_ID=
+#DISCORD_BOT_CHANNEL_ID=
 
+#optional
 DEV_FEE_ADDRESS=
+# mainnet | testnet
 NETWORK=mainnet
\ No newline at end of file
diff --git a/src/models/StratumV1Client.ts b/src/models/StratumV1Client.ts
index 81783a2..98b3ed2 100644
--- a/src/models/StratumV1Client.ts
+++ b/src/models/StratumV1Client.ts
@@ -309,16 +309,17 @@ export class StratumV1Client extends EasyUnsubscribe {
         const hashRate = await this.clientStatisticsService.getHashRateForSession(this.clientAuthorization.address, this.clientAuthorization.worker, this.extraNonceAndSessionId);
 
         let payoutInformation;
+        const devFeeAddress = this.configService.get('DEV_FEE_ADDRESS');
         //50Th/s
         const noFee = hashRate < 50000000000000;
-        if (noFee) {
+        if (noFee || devFeeAddress == null || devFeeAddress.length < 1) {
             payoutInformation = [
                 { address: this.clientAuthorization.address, percent: 100 }
             ];
 
         } else {
             payoutInformation = [
-                { address: this.configService.get('DEV_FEE_ADDRESS'), percent: 1.5 },
+                { address: devFeeAddress, percent: 1.5 },
                 { address: this.clientAuthorization.address, percent: 98.5 }
             ];
         }