diff --git a/pyproject.toml b/pyproject.toml
index 4335056ae48c..4272ab1da054 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,11 +8,9 @@ requires = [
 ]
 
 [tool.isort]
-known_mpltoolkits = "mpl_toolkits"
 known_pydata = "numpy, matplotlib.pyplot"
-known_firstparty = "matplotlib"
-sections = "FUTURE,STDLIB,THIRDPARTY,PYDATA,FIRSTPARTY,MPLTOOLKITS,LOCALFOLDER"
-no_lines_before = "MPLTOOLKITS"
+known_firstparty = "matplotlib,mpl_toolkits"
+sections = "FUTURE,STDLIB,THIRDPARTY,PYDATA,FIRSTPARTY,LOCALFOLDER"
 force_sort_within_sections = true
 
 [tool.ruff]