diff --git a/lib/classes/router.php b/lib/classes/router.php
index 0529a18e611..c654042f22e 100644
--- a/lib/classes/router.php
+++ b/lib/classes/router.php
@@ -145,11 +145,6 @@ class router {
     protected function create_app(
         string $basepath = '',
     ): void {
-        global $CFG;
-
-        // PHP Does not support autoloading functions.
-        require_once("{$CFG->libdir}/nikic/fast-route/src/functions.php");
-
         // Create an App using the DI Bridge.
         $this->app = router\bridge::create();
 
diff --git a/lib/classes/tests/route_testcase.php b/lib/classes/tests/route_testcase.php
index 22b75459d86..ebac1da0390 100644
--- a/lib/classes/tests/route_testcase.php
+++ b/lib/classes/tests/route_testcase.php
@@ -175,13 +175,9 @@ abstract class route_testcase extends \advanced_testcase {
      * @return App
      */
     protected function get_simple_app(): App {
-        global $CFG;
-        require_once("{$CFG->libdir}/nikic/fast-route/src/functions.php");
-        $app = bridge::create(
+        return bridge::create(
             container: \core\di::get_container(),
         );
-
-        return $app;
     }
 
     /**
diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index 00606308cc3..651c337f3c2 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -794,7 +794,7 @@ All rights reserved.</copyright>
       <repository>https://github.com/php-di/invoker</repository>
   </library>
   <library>
-      <location>slim</location>
+      <location>slim/slim</location>
       <name>Slim Framework</name>
       <version>4.13.0</version>
       <license>MIT</license>