diff --git a/pylace/pyproject.toml b/pylace/pyproject.toml
index 953b9896..c6988cd0 100644
--- a/pylace/pyproject.toml
+++ b/pylace/pyproject.toml
@@ -34,6 +34,7 @@ maintainers = [
 
 dependencies = [
     'numpy ~= 1.21',
+    'matplotlib ~= 3.7.1',
     'pandas ~= 1.3',
     'polars ~= 0.16.14',
     'scipy ~= 1.7',