diff --git a/lib/AppConfigOverwrite.php b/lib/AppConfigOverwrite.php
index b6573d50..c9a09df8 100644
--- a/lib/AppConfigOverwrite.php
+++ b/lib/AppConfigOverwrite.php
@@ -19,7 +19,14 @@ public function setOverwrite(array $overwrite): void {
 		$this->overWrite = $overwrite;
 	}
 
-	public function getValue(string $app, string $key, ?string $default = null): string {
+
+	/**
+	 * @param $app
+	 * @param $key
+	 * @param $default
+	 * @return string
+	 */
+	public function getValue($app, $key, $default = '') {
 		if (isset($this->overWrite[$app]) && isset($this->overWrite[$app][$key])) {
 			return $this->overWrite[$app][$key];
 		}
diff --git a/tests/stub.php b/tests/stub.php
index 0a711f6b..8e0d69ca 100644
--- a/tests/stub.php
+++ b/tests/stub.php
@@ -137,7 +137,7 @@ public function __construct(
 		/**
 		 * @deprecated - use getValue*()
 		 */
-		public function getValue(string $app, string $key, ?string $default = null): string {
+		public function getValue($app, $key, $default = '') {
 		}
 	}
 }