diff --git a/rwx/prj/__init__.py b/rwx/prj/__init__.py
index f0a2fe5..227a686 100644
--- a/rwx/prj/__init__.py
+++ b/rwx/prj/__init__.py
@@ -2,7 +2,7 @@ from os import path
 
 
 class Project:
-    def __init__(self, file_path: str):
+    def __init__(self, file_path: str) -> None:
         self.file: str = path.realpath(file_path)
         self.root: str = path.dirname(self.file)
         self.name: str = path.basename(self.root)
diff --git a/rwx/prj/sphinx.py b/rwx/prj/sphinx.py
index 392e7c2..a71bc35 100644
--- a/rwx/prj/sphinx.py
+++ b/rwx/prj/sphinx.py
@@ -6,7 +6,7 @@ from rwx.prj import Project
 
 
 class SphinxProject(Project):
-    def __init__(self, file_path: str):
+    def __init__(self, file_path: str) -> None:
         super().__init__(file_path)
 
     def build(self):