diff --git a/pyproject.toml b/pyproject.toml
index 52a94b3..6b3a3e4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 ]
 requires-python = "<4.0,>=3.11"
 dependencies = [
-    "astroid==3.3.11",
+    "astroid==4.0.0",
     "attrs==25.3.0",
     "certifi==2025.10.5",
     "charset-normalizer==3.4.3",