diff --git a/setup.py b/setup.py
index efdbd47..22b55ab 100644
--- a/setup.py
+++ b/setup.py
@@ -216,6 +216,7 @@ def run(self):
         "faiss.contrib": os.path.join(FAISS_ROOT, "contrib"),
     },
     include_package_data=False,
+    install_requires=["packaging"],
     package_data={"": ["*.i", "*.h"]},
     ext_modules=ext_modules,
     cmdclass={"build_py": CustomBuildPy},