--- a/setup.py

+++ b/setup.py

@@ -14,7 +14,7 @@ class VersionFinder(ast.NodeVisitor):

     def visit_Assign(self, node):

         if node.targets[0].id == "__version__":

-            self.version = node.value.s

+            self.version = node.value.value

 def read(*parts):