diff --git a/pyproject.toml b/pyproject.toml
index 81b7caafe..057b26b7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ optional-dependencies.dev = [
     "actionlint-py==1.7.4.18",
     "check-manifest==0.50",
     "check-wheel-contents==0.6.0",
-    "deptry==0.20.0",
+    "deptry==0.21.0",
     "dirty-equals==0.8.0",
     "doc8==1.1.1",
     "doccmd==2024.11.7",