diff --git a/calibrestekje/__init__.py b/calibrestekje/__init__.py
index 5290bb1..20ea4d6 100644
--- a/calibrestekje/__init__.py
+++ b/calibrestekje/__init__.py
@@ -28,6 +28,6 @@ except ImportError:
 
 
 try:
-    __version__ = pkg_resources.get_distribution('calibrestekje').version
+    __version__ = pkg_resources.get_distribution("calibrestekje").version
 except Exception:
-    __version__ = 'unknown'
+    __version__ = "unknown"