diff --git a/gas-relayer/config/config.js b/gas-relayer/config/config.js
index 995e7fa..46c8a16 100644
--- a/gas-relayer/config/config.js
+++ b/gas-relayer/config/config.js
@@ -11,8 +11,14 @@ module.exports = {
             "port": 8545
         },
         "blockchain": {
+            // DO NOT USE THIS ACCOUNT ON MAINNET - IT IS ONLY FOR DEV PURPOSES
+            // For dev chain, address: 0x5b9b5db9cde96fda2e2c88e83f1b833f189e01f4 has this privKey
+            privateKey: "b2ab40d549e67ba67f278781fec03b3a90515ad4d0c898a6326dd958de1e46fa" //
+
+
             // privateKey: "your_private_key",
             
+            
             // privateKeyFile: "path/to/file"
 
             // mnemonic: "12 word mnemonic",
diff --git a/installation-testnet-mainnet.md b/installation-testnet-mainnet.md
index 6acf06c..d1e9374 100644
--- a/installation-testnet-mainnet.md
+++ b/installation-testnet-mainnet.md
@@ -93,7 +93,18 @@ mv config.testnet.js config.js
 2. A node that wants to act as a relayer only needs to have a geth node with whisper enabled, and an account with ether to process the transactions. This account needs to be configured in `./config/config.js`. Edit this file and set the account:
 ```
 "blockchain": {
-   "account": "your account here"
+    // Use one of these options:
+
+    // Option1 ===========================
+    // privateKey: "your_private_key",
+
+    // Option2 ===========================
+    // privateKeyFile: "path/to/file"
+
+    // Option3 ===========================
+    // mnemonic: "12 word mnemonic",
+    // addressIndex: "0", // Optionnal. The index to start getting the address
+    // hdpath: "m/44'/60'/0'/0/" // Optionnal. HD derivation path
 },
 ```
 
diff --git a/test-dapp/config/development/genesis.json b/test-dapp/config/development/genesis.json
index 1a9501b..81f0bbe 100644
--- a/test-dapp/config/development/genesis.json
+++ b/test-dapp/config/development/genesis.json
@@ -7,7 +7,8 @@
     "nonce": "0x0000000000000042",
     "difficulty": "0x0",
     "alloc": {
-        "0x3333333333333333333333333333333333333333": {"balance": "15000000000000000000"}
+        "0x3333333333333333333333333333333333333333": {"balance": "15000000000000000000"},
+        "0x5B9B5db9Cde96FdA2E2C88e83f1B833f189E01F4": {"balance": "1500000000000000000"}
     },
     "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
     "coinbase": "0x3333333333333333333333333333333333333333",