diff --git a/README.md b/README.md
index 572e4072..afec5095 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ $ npm run build
 ## TODO
 
 - Update links to final version (from alanorth to iseal GitHub)
-- Extract controlled vocabularies and schema.csv to data directory, remove openpyxl dependency
+- Extract controlled vocabularies to data directory
 - Add more information and instructions to README.md
 
 ## License
diff --git a/pyproject.toml b/pyproject.toml
index 15738305..95ba9b4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,6 @@ license = "GPL-3.0-only"
 [tool.poetry.dependencies]
 python = "^3.9"
 pandas = "^1.3.4"
-openpyxl = "^3.0.9"
 ipykernel = "^6.4.2"
 rdflib = "^6.0.2"