diff --git a/extensions/package-manager/src/Composer/ComposerAdapter.php b/extensions/package-manager/src/Composer/ComposerAdapter.php
index 5403b90d2..86a116057 100644
--- a/extensions/package-manager/src/Composer/ComposerAdapter.php
+++ b/extensions/package-manager/src/Composer/ComposerAdapter.php
@@ -10,6 +10,7 @@
 namespace Flarum\PackageManager\Composer;
 
 use Composer\Console\Application;
+use Flarum\Foundation\Paths;
 use Flarum\PackageManager\OutputLogger;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\BufferedOutput;
@@ -34,10 +35,16 @@ class ComposerAdapter
      */
     private $output;
 
-    public function __construct(Application $application, OutputLogger $logger)
+    /**
+     * @var Paths
+     */
+    private $paths;
+
+    public function __construct(Application $application, OutputLogger $logger, Paths $paths)
     {
         $this->application = $application;
         $this->logger = $logger;
+        $this->paths = $paths;
         $this->output = new BufferedOutput();
     }
 
@@ -45,7 +52,11 @@ class ComposerAdapter
     {
         $this->application->resetComposer();
 
+        // This hack is necessary so that relative path repositories are resolved properly.
+        $currDir = getcwd();
+        chdir($this->paths->base);
         $exitCode = $this->application->run($input, $this->output);
+        chdir($currDir);
 
         $outputContents = $this->output->fetch();
 
diff --git a/extensions/package-manager/src/PackageManagerServiceProvider.php b/extensions/package-manager/src/PackageManagerServiceProvider.php
index 630bc9d53..1269f4683 100755
--- a/extensions/package-manager/src/PackageManagerServiceProvider.php
+++ b/extensions/package-manager/src/PackageManagerServiceProvider.php
@@ -50,7 +50,7 @@ class PackageManagerServiceProvider extends AbstractServiceProvider
             @ini_set('memory_limit', '1G');
             @set_time_limit(5 * 60);
 
-            return new ComposerAdapter($composer, $container->make(OutputLogger::class));
+            return new ComposerAdapter($composer, $container->make(OutputLogger::class), $container->make(Paths::class));
         });
 
         $this->container->alias(ComposerAdapter::class, 'flarum.composer');