diff --git a/oioioi/sinolpack/files/sinol-makefiles.tgz b/oioioi/sinolpack/files/sinol-makefiles.tgz
index 5de3ff9db..5116ed896 100644
Binary files a/oioioi/sinolpack/files/sinol-makefiles.tgz and b/oioioi/sinolpack/files/sinol-makefiles.tgz differ
diff --git a/oioioi/sinolpack/files/test_interactive_package.tgz b/oioioi/sinolpack/files/test_interactive_package.tgz
index 5548e9411..a45806d15 100644
Binary files a/oioioi/sinolpack/files/test_interactive_package.tgz and b/oioioi/sinolpack/files/test_interactive_package.tgz differ
diff --git a/oioioi/sinolpack/files/test_inwer_input_names.zip b/oioioi/sinolpack/files/test_inwer_input_names.zip
new file mode 100644
index 000000000..d975cb4ff
Binary files /dev/null and b/oioioi/sinolpack/files/test_inwer_input_names.zip differ
diff --git a/oioioi/sinolpack/package.py b/oioioi/sinolpack/package.py
index 2b298ee85..445c91e3f 100644
--- a/oioioi/sinolpack/package.py
+++ b/oioioi/sinolpack/package.py
@@ -816,6 +816,7 @@ def _verify_inputs(self, tests):
                 job['task_priority'] = TASK_PRIORITY
                 job['exe_file'] = env['compiled_file']
                 job['in_file'] = django_to_filetracker_path(test.input_file)
+                job['in_file_name'] = self.short_name + test.name + '.in'
                 job['use_sandboxes'] = self.use_sandboxes
                 jobs[test.name] = job
 
diff --git a/oioioi/sinolpack/tests.py b/oioioi/sinolpack/tests.py
index d46ab2cf8..470e1b418 100644
--- a/oioioi/sinolpack/tests.py
+++ b/oioioi/sinolpack/tests.py
@@ -740,6 +740,30 @@ def test_inwer_failure_package(self):
         # Bad packages need to be left over for the error messages
         self.assertEqual(ProblemPackage.objects.count(), 1)
 
+    @both_configurations
+    def test_inwer_input_names(self):
+        ProblemInstance.objects.all().delete()
+
+        contest = Contest.objects.get()
+        filename = get_test_filename('test_inwer_input_names.zip')
+        self.assertTrue(self.client.login(username='test_admin'))
+        url = reverse('oioioiadmin:problems_problem_add')
+        response = self.client.get(url, {'contest_id': contest.id}, follow=True)
+        url = response.redirect_chain[-1][0]
+        self.assertEqual(response.status_code, 200)
+        response = self.client.post(
+            url,
+            {
+                'package_file': open(filename, 'rb'),
+                'visibility': Problem.VISIBILITY_PRIVATE,
+            },
+            follow=True,
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(Problem.objects.count(), 1)
+        self.assertEqual(ProblemInstance.objects.count(), 2)
+        self.assertEqual(ProblemPackage.objects.count(), 1)
+
 
 class TestSinolPackageCreator(TestCase, TestStreamingMixin):
     fixtures = [
diff --git a/requirements.txt b/requirements.txt
index 627db2390..6913a0523 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # These dependencies need to be installed from external sources,
 # therefore they must be listed here. Moreover, they cannot be listed in
 # setup.py, as pip is not able to install them.
-http://github.com/sio2project/sioworkers/archive/refs/tags/v1.4.2.tar.gz
+http://github.com/sio2project/sioworkers/archive/refs/tags/v1.4.3.tar.gz
 
 -e .