diff --git a/requirements.txt b/requirements.txt
index 08058b6..258955f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ httplib2==0.9.2
 jdcal==1.3
 matplotlib==1.5.3
 numpy==1.11.2
-openpyxl==2.4.1
+openpyxl==2.4.2
 pandas==0.19.1
 pyparsing==2.1.10
 python-dateutil==2.6.0