diff --git a/pyproject.toml b/pyproject.toml
index 145b399..c33a0ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,12 +32,12 @@ Repository = "https://github.com/FBumann/xarray_plotly"
 
 [project.optional-dependencies]
 dev = [
-    "pytest==8.3.5",
-    "pytest-cov==6.0.0",
-    "mypy==1.14.1",
-    "ruff==0.9.2",
-    "pre-commit==4.0.1",
-    "nbstripout==0.8.1",
+    "pytest==9.0.2",
+    "pytest-cov==7.0.0",
+    "mypy==1.19.1",
+    "ruff==0.14.11",
+    "pre-commit==4.5.1",
+    "nbstripout==0.8.2",
 ]
 docs = [
     "mkdocs==1.6.1",