diff --git a/admin/main.go b/admin/main.go
index 112d94de..f6a494e3 100644
--- a/admin/main.go
+++ b/admin/main.go
@@ -20,7 +20,7 @@ var StaticDir string
 
 func main() {
 	var bind = flag.String("bind", "127.0.0.1:8081", "Bind port/socket")
-	var dsn = flag.String("dsn", "fic:fic@/fic", "DSN to connect to the MySQL server")
+	var dsn = flag.String("dsn", fic.DSNGenerator(), "DSN to connect to the MySQL server")
 	var baseURL = flag.String("baseurl", "/", "URL prepended to each URL")
 	flag.StringVar(&SubmissionDir, "submission", "./submissions/", "Base directory where save submissions")
 	flag.StringVar(&PKIDir, "pki", "./pki/", "Base directory where found PKI scripts")
@@ -70,7 +70,7 @@ func main() {
 	}
 
 	log.Println("Opening database...")
-	if err := fic.DBInit(fmt.Sprintf("%s?parseTime=true", *dsn)); err != nil {
+	if err := fic.DBInit(*dsn); err != nil {
 		log.Fatal("Cannot open the database: ", err)
 	}
 	defer fic.DBClose()
diff --git a/backend/main.go b/backend/main.go
index 6febea19..a0cb785b 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -2,7 +2,6 @@ package main
 
 import (
 	"flag"
-	"fmt"
 	"io/ioutil"
 	"log"
 	"math/rand"
@@ -66,7 +65,7 @@ func reloadSettings(config settings.FICSettings) {
 }
 
 func main() {
-	var dsn = flag.String("dsn", "fic:fic@/fic", "DSN to connect to the MySQL server")
+	var dsn = flag.String("dsn", fic.DSNGenerator(), "DSN to connect to the MySQL server")
 	flag.StringVar(&SubmissionDir, "submission", "./submissions", "Base directory where save submissions")
 	flag.StringVar(&TeamsDir, "teams", "./TEAMS", "Base directory where save teams JSON files")
 	flag.StringVar(&fic.FilesDir, "files", "/files", "Request path prefix to reach files")
@@ -87,7 +86,7 @@ func main() {
 	}
 
 	log.Println("Opening DB...")
-	if err := fic.DBInit(fmt.Sprintf("%s?parseTime=true", *dsn)); err != nil {
+	if err := fic.DBInit(*dsn); err != nil {
 		log.Fatal("Cannot open the database: ", err)
 	}
 	defer fic.DBClose()
diff --git a/libfic/db.go b/libfic/db.go
index a0ac11a8..a08dfc00 100644
--- a/libfic/db.go
+++ b/libfic/db.go
@@ -2,14 +2,40 @@ package fic
 
 import (
 	"database/sql"
+	"os"
 	_ "github.com/go-sql-driver/mysql"
 )
 
 var db *sql.DB
 
+func DSNGenerator() string {
+	db_user := "fic"
+	db_password := "fic"
+	db_host := ""
+	db_db := "fic"
+
+	if v, exists := os.LookupEnv("MYSQL_HOST"); exists {
+		db_host = v
+	}
+	if v, exists := os.LookupEnv("MYSQL_PASSWORD"); exists {
+		db_password = v
+	} else if v, exists := os.LookupEnv("MYSQL_ROOT_PASSWORD"); exists {
+		db_user = "root"
+		db_password = v
+	}
+	if v, exists := os.LookupEnv("MYSQL_USER"); exists {
+		db_user = v
+	}
+	if v, exists := os.LookupEnv("MYSQL_DATABASE"); exists {
+		db_db = v
+	}
+
+	return db_user + ":" + db_password + "@" + db_host + "/" + db_db
+}
+
 func DBInit(dsn string) error {
 	var err error
-	if db, err = sql.Open("mysql", dsn); err != nil {
+	if db, err = sql.Open("mysql", dsn + "?parseTime=true&foreign_key_checks=1"); err != nil {
 		return err
 	}
 	return nil
@@ -158,9 +184,6 @@ CREATE TABLE IF NOT EXISTS team_hints(
 `); err != nil {
 		return err
 	}
-	if _, err := db.Exec("SET FOREIGN_KEY_CHECKS = 1;"); err != nil {
-		return err
-	}
 	return nil
 }