diff --git a/python/requirements.txt b/python/requirements.txt
index cb4426f..2d1450b 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,7 +1,7 @@
 Cython>=0.22
 pystan>=2.14,<=2.18.1
 numpy>=1.10.0
-pandas>=0.20.1
+pandas>=0.23.4
 matplotlib>=2.0.0
 lunardate>=0.1.5
 convertdate>=2.1.2