diff --git a/REQUIREMENTS b/REQUIREMENTS
index 4beaebf..ba5b5e5 100644
--- a/REQUIREMENTS
+++ b/REQUIREMENTS
@@ -73,6 +73,7 @@ oauth2==1.9.0.post1
 olefile==0.46; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 oletools==0.56
 opencv-python==4.5.1.48
+openpyxl
 pandas-ods-reader==0.0.7
 pandas==1.1.5
 passivetotal==1.0.31