diff --git a/setup.py b/setup.py
index 8136579..5231bf4 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@
     author_email="tket-support@cambridgequantum.com",
     python_requires=">=3.9",
     project_urls={
-        "Documentation": "https://tket.quantinuum.com/extensions/pytket-qulacs/api/index.html",
+        "Documentation": "https://tket.quantinuum.com/extensions/pytket-qulacs/index.html",
         "Source": "https://github.com/CQCL/pytket-qulacs",
         "Tracker": "https://github.com/CQCL/pytket-qulacs/issues",
     },