diff --git a/package.json b/package.json
index 27546a0..143b78e 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "oxfmt": "^0.21.0",
     "oxlint": "^1.36.0",
     "oxlint-tsgolint": "^0.10.0",
-    "tsdown": "^0.18.3",
+    "tsdown": "^0.18.4",
     "typedoc": "^0.28.15",
     "typescript": "5.9.3",
     "vitest": "^4.0.16"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 23b40fa..e7701f2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -40,7 +40,7 @@ importers:
         specifier: ^0.10.0
         version: 0.10.0
       tsdown:
-        specifier: ^0.18.3
+        specifier: ^0.18.4
         version: 0.18.4(publint@0.3.16)(typescript@5.9.3)
       typedoc:
         specifier: ^0.28.15