diff --git a/code-postprocessing/pyproject.toml b/code-postprocessing/pyproject.toml
index 04b0cd789..63fd43776 100644
--- a/code-postprocessing/pyproject.toml
+++ b/code-postprocessing/pyproject.toml
@@ -34,6 +34,7 @@ classifiers = [
 dependencies = [
   "matplotlib >=3.5.0",
   "numpy >=1.21.0",
+  "setuptools >=61.0", # For pkg_resources
 ]
 dynamic = ["version"]