diff --git a/pyproject.toml b/pyproject.toml
index e7c64bfb..27ad93dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,6 @@ dependencies = [
     "numpy~=1.19",
     "scipy~=1.5",
     "scikit-learn~=1.0",
-    "colour~=0.1",
     "errr~=1.2",
     "rtree~=1.0",
     "psutil~=5.8",