diff --git a/requirements.txt b/requirements.txt
index 7364e1dcd97e9ebada90b8bbc9f4bc2c0a54d3ac..b3fa94465421ee9996da0d653216f47c2ed24062 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ ase==3.12.0
 setuptools
 scipy
 mdtraj==1.7.2
+pandas