diff --git a/docs/conf.py b/docs/conf.py
index 7aaef77c..771bc45e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -17,7 +17,7 @@
 
 import os
 
-DIR = os.path.dirname("__file__")
+DIR = os.path.dirname(__file__)
 with open(os.path.join(DIR, "../setup.py"), "r") as f:
     for line in f:
         if "version=" in line: