diff --git a/.tests/tests/DbTest.php b/.tests/tests/DbTest.php
index 558eadf..57ce7a1 100644
--- a/.tests/tests/DbTest.php
+++ b/.tests/tests/DbTest.php
@@ -58,6 +58,27 @@ class DbTest extends TestCase {
       $this->assertEquals($fileName, uDb::getDbName("sqlite:$fileName"));
     }
   }
+
+  public function testNormalizeDsn() {
+    $testDbName = "testDbName";
+    $nonSqlite = [
+      "mysql:host=db.example.com;port=3306;dbname=$testDbName",
+      "mysql:host=db.example.com;dbname=$testDbName;port=3306",
+      "mysql:dbname=$testDbName;host=db.example.com;port=3306",
+      "mysql:unix_socket=/tmp/mysql.sock;dbname=$testDbName;charset=utf8",
+      "pgsql:host=localhost;port=5432;dbname=$testDbName;user=myuser;password=mypass",
+      "pgsql:host=db.example.com port=31075 dbname=$testDbName",
+      "pgsql:host=db.example.com port=31075 dbname=$testDbName user=myuser password=mypass",
+    ];
+
+    foreach ($nonSqlite as $dsn) {
+      $this->assertEquals($dsn, uDb::normalizeDsn($dsn));
+    }
+
+    $this->assertEquals("sqlite:" . realpath(ROOT_DIR . "/index.php"), uDb::normalizeDsn("sqlite:index.php"));
+    $this->assertEquals("sqlite:" . realpath(ROOT_DIR . "/index.php"), uDb::normalizeDsn("sqlite:helpers/../index.php"));
+    $this->assertNotEquals("sqlite:" . realpath(ROOT_DIR . "/index.php"), uDb::normalizeDsn("sqlite:../index.php"));
+  }
 }
 
 ?>
\ No newline at end of file
diff --git a/.tests/tests/UtilsTest.php b/.tests/tests/UtilsTest.php
index 38eefd8..a6dd79a 100644
--- a/.tests/tests/UtilsTest.php
+++ b/.tests/tests/UtilsTest.php
@@ -99,5 +99,21 @@ class UtilsTest extends TestCase {
     unset($_SERVER["HTTPS"]);
     $this->assertEquals($expected, $result);
   }
+
+  public function testIsAbsolutePath() {
+    $this->assertTrue(uUtils::isAbsolutePath("/foo"));
+    $this->assertTrue(uUtils::isAbsolutePath("/foo/bar"));
+    $this->assertTrue(uUtils::isAbsolutePath("/"));
+    $this->assertTrue(uUtils::isAbsolutePath("/."));
+    $this->assertTrue(uUtils::isAbsolutePath("\\"));
+    $this->assertTrue(uUtils::isAbsolutePath("C:\\\\foo"));
+    $this->assertTrue(uUtils::isAbsolutePath("Z:\\\\FOO/BAR"));
+
+    $this->assertFalse(uUtils::isAbsolutePath("foo"));
+    $this->assertFalse(uUtils::isAbsolutePath("foo/bar"));
+    $this->assertFalse(uUtils::isAbsolutePath("./foo"));
+    $this->assertFalse(uUtils::isAbsolutePath("../"));
+    $this->assertFalse(uUtils::isAbsolutePath(".\\foo"));
+  }
 }
 ?>
diff --git a/helpers/db.php b/helpers/db.php
index bb167bc..dffd40a 100644
--- a/helpers/db.php
+++ b/helpers/db.php
@@ -17,6 +17,8 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
+require_once(ROOT_DIR . "/helpers/utils.php");
+
  /**
   * PDO wrapper
   */
@@ -122,7 +124,7 @@
       }
       include($configFile);
       if (isset($dbdsn)) {
-        self::$dbdsn = $dbdsn;
+        self::$dbdsn = self::normalizeDsn($dbdsn);
       }
       if (isset($dbuser)) {
         self::$dbuser = $dbuser;
@@ -241,5 +243,24 @@
       }
       return $name;
     }
+
+    /**
+     * Normalize DSN.
+     * Make sure sqlite DSN file path is absolute
+     * @param $dsn string DSN
+     * @return string Normalized DSN
+     */
+    public static function normalizeDsn($dsn) {
+      if (stripos($dsn, "sqlite") !== 0) {
+        return $dsn;
+      }
+      $arr = explode(":", $dsn, 2);
+      if (count($arr) < 2 || empty($arr[1]) || uUtils::isAbsolutePath($arr[1])) {
+        return $dsn;
+      }
+      $scheme = $arr[0];
+      $path = dirname(__DIR__) . DIRECTORY_SEPARATOR . $arr[1];
+      return $scheme . ":" . realpath(dirname($path)) . DIRECTORY_SEPARATOR . basename(($path));
+    }
   }
 ?>
diff --git a/helpers/utils.php b/helpers/utils.php
index 566d2de..5dcd346 100644
--- a/helpers/utils.php
+++ b/helpers/utils.php
@@ -39,6 +39,14 @@
       return min($upload_max_filesize, $post_max_size, $memory_limit);
     }
 
+    /**
+     * @param $path string Path
+     * @return bool True if is absolute
+     */
+    public static function isAbsolutePath($path) {
+      return $path[0] === '/' || $path[0] === '\\' || preg_match('/^[a-zA-Z]:\\\\/', $path);
+    }
+
     /**
      * Get number of bytes from ini parameter.
      * Optionally parses shorthand byte values (G, M, B)
diff --git a/scripts/setup.php b/scripts/setup.php
index 257d5c1..97679b9 100644
--- a/scripts/setup.php
+++ b/scripts/setup.php
@@ -30,6 +30,13 @@ if (version_compare(PHP_VERSION, "5.5.0", "<")) {
 }
 
 define("ROOT_DIR", dirname(__DIR__));
+
+require_once(ROOT_DIR . "/helpers/db.php");
+require_once(ROOT_DIR . "/helpers/config.php");
+require_once(ROOT_DIR . "/helpers/lang.php");
+require_once(ROOT_DIR . "/helpers/user.php");
+require_once(ROOT_DIR . "/helpers/utils.php");
+
 $dbConfig = ROOT_DIR . "/config.php";
 $dbConfigLoaded = false;
 $configDSN = "";
@@ -40,16 +47,11 @@ if (file_exists($dbConfig)) {
   /** @noinspection PhpIncludeInspection */
   include($dbConfig);
   $dbConfigLoaded = true;
-  if (isset($dbdsn)) { $configDSN = $dbdsn; }
+  if (isset($dbdsn)) { $configDSN = uDb::normalizeDsn($dbdsn); }
   if (isset($dbuser)) { $configUser = $dbuser; }
   if (isset($dbpass)) { $configPass = $dbpass; }
   if (isset($dbprefix)) { $configPrefix = $dbprefix; }
 }
-require_once(ROOT_DIR . "/helpers/db.php");
-require_once(ROOT_DIR . "/helpers/config.php");
-require_once(ROOT_DIR . "/helpers/lang.php");
-require_once(ROOT_DIR . "/helpers/user.php");
-require_once(ROOT_DIR . "/helpers/utils.php");
 
 $command = uUtils::postString("command");
 $language = uUtils::getString("lang", "en");