diff --git a/pyproject.toml b/pyproject.toml
index 59f3793..333d38c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,8 +83,8 @@ doc = [
     "mkdocs-section-index>=0.3.0,<1.0",
 ]
 dev = [
-    "black==25.11.0",
-    "isort>=5.0,<8.0",
+    "black==26.1.0",
+    "isort>=5.0,<9.0",
     "build>=1.0.0,<2.0.0",
     "twine>=4.0.0,<7.0.0",
 ]