diff --git a/requirements.txt b/requirements.txt
index 6ff43f8c1..b6f882840 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ Flask-Login==0.4.1
 blinker==1.4
 pyexcel==0.5.7
 pyexcel-io==0.5.6
-pyexcel-xls==0.5.5
+pyexcel-xls==0.5.6
 pyexcel-xlsx==0.5.5
 pyexcel-ods3==0.5.2
 pytz==2018.3