diff --git a/setup.py b/setup.py
index 4197f19..4d870d4 100644
--- a/setup.py
+++ b/setup.py
@@ -18,6 +18,6 @@
     },
     packages=["pyfeng"],
     test_suite="tests",
-    install_requires=["numpy", "scipy"],
+    install_requires=["numpy", "scipy", "pandas"],
     package_data={'pyfeng': ['data/*.xlsx']}
 )