--- 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):