diff --git a/lib/tfw/components/source_code_event_handler.py b/lib/tfw/components/source_code_event_handler.py
index 4b6662c..6afcf63 100644
--- a/lib/tfw/components/source_code_event_handler.py
+++ b/lib/tfw/components/source_code_event_handler.py
@@ -14,7 +14,7 @@ LOG = logging.getLogger(__name__)
 
 
 class FileManager:  # pylint: disable=too-many-instance-attributes
-    def __init__(self, working_directory, allowed_directories=None, selected_file=None, exclude=None):
+    def __init__(self, working_directory, allowed_directories, selected_file=None, exclude=None):
         self._exclude, self.exclude = None, exclude
         self._allowed_directories, self.allowed_directories = None, allowed_directories
         self._workdir, self.workdir = None, working_directory
@@ -40,9 +40,8 @@ class FileManager:  # pylint: disable=too-many-instance-attributes
     def workdir(self, directory):
         if not exists(directory) or not isdir(directory):
             raise EnvironmentError('"{}" is not a directory!'.format(directory))
-        if self.allowed_directories:
-            if not self._is_whitelisted(directory):
-                raise EnvironmentError('Directory "{}" is not in whitelist!'.format(directory))
+        if not self._is_whitelisted(directory):
+            raise EnvironmentError('Directory "{}" is not in whitelist!'.format(directory))
         self._workdir = directory
 
     @property
@@ -92,7 +91,7 @@ class FileManager:  # pylint: disable=too-many-instance-attributes
 
 class SourceCodeEventHandler(TriggerlessEventHandler):
     # pylint: disable=too-many-arguments
-    def __init__(self, key, directory, allowed_directories=None, selected_file=None, exclude=None):
+    def __init__(self, key, directory, allowed_directories, selected_file=None, exclude=None):
         super().__init__(key)
         self.filemanager = FileManager(allowed_directories=allowed_directories, working_directory=directory,
                                        selected_file=selected_file, exclude=exclude)