diff --git a/requirements.txt b/requirements.txt
index 5bd63e3..9d8a871 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 numpy==1.14.0
 pandas==0.22.0
-workalendar==2.3.1
+workalendar==7.1.0