diff --git a/pyproject.toml b/pyproject.toml
index f5b6d7c..40b5680 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 ]
 
 requires = [
-
+    "openpyxl >= 3.0.0",
 ]
 requires-python = ">=3.7"
 
diff --git a/test data/Verbrauchsmittel-Toto-2020.xlsx b/test data/Verbrauchsmittel-Toto-2020.xlsx
new file mode 100755
index 0000000..a23bb10
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diff --git a/test data/Verwendungsnachweis_und_Kassenstand_SAP.xlsx b/test data/Verwendungsnachweis_und_Kassenstand_SAP.xlsx
new file mode 100644
index 0000000..3f712d6
Binary files /dev/null and b/test data/Verwendungsnachweis_und_Kassenstand_SAP.xlsx differ