diff --git a/config/config.env b/config/config.env
index a6bd656..f4f0f07 100644
--- a/config/config.env
+++ b/config/config.env
@@ -4,7 +4,7 @@
 HTTP_GW_WALLET_PATH=/path/to/wallet.json
 # Account address. If omitted default one will be used.
 HTTP_GW_WALLET_ADDRESS=NfgHwwTi3wHAS8aFAN243C5vGbkYDpqLHP
-# Passphrase to decrypt wallet.
+# Passphrase to decrypt wallet. If you're using a wallet without a password, place '' here.
 HTTP_GW_WALLET_PASSPHRASE=pwd
 
 # Enable metrics.
diff --git a/config/config.yaml b/config/config.yaml
index 9cdb7ce..ef77302 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -1,7 +1,7 @@
 wallet:
   path: /path/to/wallet.json # Path to wallet.
   address: NfgHwwTi3wHAS8aFAN243C5vGbkYDpqLHP # Account address. If omitted default one will be used.
-  passphrase: pwd # Passphrase to decrypt wallet.
+  passphrase: pwd # Passphrase to decrypt wallet. If you're using a wallet without a password, place '' here.
 
 metrics: true # Enable metrics.
 pprof: true # Enable pprof.