diff --git a/cmd/server.go b/cmd/server.go
index 94b180c..72d97da 100644
--- a/cmd/server.go
+++ b/cmd/server.go
@@ -34,8 +34,10 @@ func main() {
 	config.LoadENV()
 
 	// initialize database
-	db := config.InitDB()
-
+	db, err := config.InitDB()
+	if err != nil {
+		logger.Log.Error(err)
+	}
 	// initialize repository
 	pokemonRepo := repository.NewPokemonRepository(db)
 	typeRepo := repository.NewTypeRepository(db)
diff --git a/config/database.go b/config/database.go
index cdfd06c..198bf7c 100644
--- a/config/database.go
+++ b/config/database.go
@@ -2,6 +2,7 @@ package config
 
 import (
 	"database/sql"
+	"fmt"
 	"os"
 	"time"
 
@@ -17,18 +18,22 @@ type Database struct {
 }
 
 // InitDB - .
-func InitDB() *Database {
-	db, err := sql.Open("mysql", os.Getenv("DATA_SOURCE"))
+func InitDB() (*Database, error) {
+	dataSource := os.Getenv("DATA_SOURCE")
+	if dataSource == "" {
+		return nil, fmt.Errorf("DATA_SOURCE environment variable is empty or not set")
+	}
+
+	db, err := sql.Open("mysql", dataSource)
 	if err != nil {
-		logger.Log.Println(errors.Wrap(err, "database connection"))
-		panic(err)
+		return nil, fmt.Errorf("failed to open database connection: %w", err)
 	}
 
 	db.SetMaxOpenConns(10)
 	db.SetConnMaxIdleTime(time.Minute * 10)
 
-	logger.Log.Println("database connected...")
-	return &Database{DB: db}
+	fmt.Println("Database connected...")
+	return &Database{DB: db}, nil
 }
 
 // Close - close db
diff --git a/server.exe b/server.exe
new file mode 100644
index 0000000..6285707
Binary files /dev/null and b/server.exe differ