diff --git a/src/Http/Controllers/InstallController.php b/src/Http/Controllers/InstallController.php
index ab9bfd3..2275ee6 100644
--- a/src/Http/Controllers/InstallController.php
+++ b/src/Http/Controllers/InstallController.php
@@ -170,7 +170,7 @@ public function saveDatabaseSettings()
             $dotEnv = Dotenv::create([base_path()]);
             foreach ($dotEnv->load() as $envVar => $envValue) {
                 if (key_exists($envVar, $updateEnv)) {
-                    $envFileContents = preg_replace('#' . $envVar . '.*=.*' . $envValue . '.*#', $envVar . '=' . $updateEnv[$envVar], $envFileContents);
+                    $envFileContents = preg_replace('#^\W*' . $envVar . '\W*=\W*' . $envValue . '.\W*$#', $envVar . '=' . $updateEnv[$envVar], $envFileContents);
                 }
             }