diff --git a/requirements.txt b/requirements.txt
index 1be7920..ac25808 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 jdcal==1.3
-openpyxl==2.4.0
+openpyxl==2.4.2
 unicodecsv==0.14.1
 xlrd==1.0.0
 xlwt==1.1.2