diff --git a/pyproject.toml b/pyproject.toml
index 8ea8323d5..22dbfa59a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ optional-dependencies.dev = [
     "check-manifest==0.50",
     "check-wheel-contents==0.6.1",
     "deptry==0.21.2",
-    "dirty-equals==0.8.0",
+    "dirty-equals==0.9.0",
     "doc8==1.1.1",
     "doccmd==2025.1.11",
     "docformatter==1.7.5",