diff --git a/main.go b/main.go
index 3b5c1f0..97eea9f 100644
--- a/main.go
+++ b/main.go
@@ -57,27 +57,32 @@ func main() {
 					Usage:  "SSH server bind address",
 				},
 				cli.StringFlag{
-					Name:  "db-driver",
-					Value: "sqlite3",
-					Usage: "GORM driver (sqlite3)",
+					Name:   "db-driver",
+					EnvVar: "SSHPORTAL_DB_DRIVER",
+					Value:  "sqlite3",
+					Usage:  "GORM driver (sqlite3)",
 				},
 				cli.StringFlag{
-					Name:  "db-conn",
-					Value: "./sshportal.db",
-					Usage: "GORM connection string",
+					Name:   "db-conn",
+					EnvVar: "SSHPORTAL_DATABASE_URL",
+					Value:  "./sshportal.db",
+					Usage:  "GORM connection string",
 				},
 				cli.BoolFlag{
-					Name:  "debug, D",
-					Usage: "Display debug information",
+					Name:   "debug, D",
+					EnvVar: "SSHPORTAL_DEBUG",
+					Usage:  "Display debug information",
 				},
 				cli.StringFlag{
-					Name:  "aes-key",
-					Usage: "Encrypt sensitive data in database (length: 16, 24 or 32)",
+					Name:   "aes-key",
+					EnvVar: "SSHPORTAL_AES_KEY",
+					Usage:  "Encrypt sensitive data in database (length: 16, 24 or 32)",
 				},
 				cli.StringFlag{
-					Name:  "logs-location",
-					Value: "./log",
-					Usage: "Store user session files",
+					Name:   "logs-location",
+					EnvVar: "SSHPORTAL_LOGS_LOCATION",
+					Value:  "./log",
+					Usage:  "Store user session files",
 				},
 			},
 		}, {