diff --git a/dist/index.js b/dist/index.js
index be33e5f..a9219bc 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -29397,7 +29397,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.getRef = void 0;
-const v = __importStar(__nccwpck_require__(4937));
+const v = __importStar(__nccwpck_require__(6355));
 const schema_1 = __nccwpck_require__(3731);
 const utils_1 = __nccwpck_require__(1356);
 const getRef = ({ eventName, payload }) => {
@@ -29460,7 +29460,7 @@ exports.getRef = getRef;
 
 Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.NullableStringSchema = exports.OptionalStringSchema = exports.StringSchema = void 0;
-const valibot_1 = __nccwpck_require__(4937);
+const valibot_1 = __nccwpck_require__(6355);
 exports.StringSchema = (0, valibot_1.string)();
 exports.OptionalStringSchema = (0, valibot_1.optional)((0, valibot_1.string)());
 exports.NullableStringSchema = (0, valibot_1.nullable)((0, valibot_1.string)());
@@ -31317,7 +31317,7 @@ module.exports = parseParams
 
 /***/ }),
 
-/***/ 4937:
+/***/ 6355:
 /***/ ((module) => {
 
 "use strict";
@@ -31364,6 +31364,7 @@ __export(src_exports, {
   MAC48_REGEX: () => MAC48_REGEX,
   MAC64_REGEX: () => MAC64_REGEX,
   MAC_REGEX: () => MAC_REGEX,
+  NANO_ID_REGEX: () => NANO_ID_REGEX,
   OCTAL_REGEX: () => OCTAL_REGEX,
   ULID_REGEX: () => ULID_REGEX,
   UUID_REGEX: () => UUID_REGEX,
@@ -31478,6 +31479,7 @@ __export(src_exports, {
   minValue: () => minValue,
   multipleOf: () => multipleOf,
   nan: () => nan,
+  nanoid: () => nanoid,
   never: () => never,
   nonEmpty: () => nonEmpty,
   nonNullable: () => nonNullable,
@@ -31567,6 +31569,8 @@ __export(src_exports, {
   ulid: () => ulid,
   undefined: () => undefined_,
   undefined_: () => undefined_,
+  undefinedable: () => undefinedable,
+  undefinedableAsync: () => undefinedableAsync,
   union: () => union,
   unionAsync: () => unionAsync,
   unknown: () => unknown,
@@ -31623,6 +31627,7 @@ var ISO_WEEK_REGEX = /^\d{4}-W(?:0[1-9]|[1-4]\d|5[0-3])$/u;
 var MAC48_REGEX = /^(?:[\da-f]{2}:){5}[\da-f]{2}$|^(?:[\da-f]{2}-){5}[\da-f]{2}$|^(?:[\da-f]{4}\.){2}[\da-f]{4}$/iu;
 var MAC64_REGEX = /^(?:[\da-f]{2}:){7}[\da-f]{2}$|^(?:[\da-f]{2}-){7}[\da-f]{2}$|^(?:[\da-f]{4}\.){3}[\da-f]{4}$|^(?:[\da-f]{4}:){3}[\da-f]{4}$/iu;
 var MAC_REGEX = /^(?:[\da-f]{2}:){5}[\da-f]{2}$|^(?:[\da-f]{2}-){5}[\da-f]{2}$|^(?:[\da-f]{4}\.){2}[\da-f]{4}$|^(?:[\da-f]{2}:){7}[\da-f]{2}$|^(?:[\da-f]{2}-){7}[\da-f]{2}$|^(?:[\da-f]{4}\.){3}[\da-f]{4}$|^(?:[\da-f]{4}:){3}[\da-f]{4}$/iu;
+var NANO_ID_REGEX = /^[\w-]+$/u;
 var OCTAL_REGEX = /^(?:0o)?[0-7]+$/iu;
 var ULID_REGEX = /^[\da-hjkmnp-tv-z]{26}$/iu;
 var UUID_REGEX = /^[\da-f]{8}(?:-[\da-f]{4}){3}-[\da-f]{12}$/iu;
@@ -32852,6 +32857,25 @@ function multipleOf(requirement, message) {
   };
 }
 
+// src/actions/nanoid/nanoid.ts
+function nanoid(message) {
+  return {
+    kind: "validation",
+    type: "nanoid",
+    reference: nanoid,
+    async: false,
+    expects: null,
+    requirement: NANO_ID_REGEX,
+    message,
+    _run(dataset, config2) {
+      if (dataset.typed && !this.requirement.test(dataset.value)) {
+        _addIssue(this, "Nano ID", dataset, config2);
+      }
+      return dataset;
+    }
+  };
+}
+
 // src/actions/nonEmpty/nonEmpty.ts
 function nonEmpty(message) {
   return {
@@ -36521,6 +36545,70 @@ function undefined_(message) {
   };
 }
 
+// src/schemas/undefinedable/undefinedable.ts
+function undefinedable(wrapped, ...args) {
+  const schema = {
+    kind: "schema",
+    type: "undefinedable",
+    reference: undefinedable,
+    expects: `(${wrapped.expects} | undefined)`,
+    async: false,
+    wrapped,
+    _run(dataset, config2) {
+      if (dataset.value === void 0) {
+        if ("default" in this) {
+          dataset.value = getDefault(
+            this,
+            dataset,
+            config2
+          );
+        }
+        if (dataset.value === void 0) {
+          dataset.typed = true;
+          return dataset;
+        }
+      }
+      return this.wrapped._run(dataset, config2);
+    }
+  };
+  if (0 in args) {
+    schema.default = args[0];
+  }
+  return schema;
+}
+
+// src/schemas/undefinedable/undefinedableAsync.ts
+function undefinedableAsync(wrapped, ...args) {
+  const schema = {
+    kind: "schema",
+    type: "undefinedable",
+    reference: undefinedableAsync,
+    expects: `(${wrapped.expects} | undefined)`,
+    async: true,
+    wrapped,
+    async _run(dataset, config2) {
+      if (dataset.value === void 0) {
+        if ("default" in this) {
+          dataset.value = await getDefault(
+            this,
+            dataset,
+            config2
+          );
+        }
+        if (dataset.value === void 0) {
+          dataset.typed = true;
+          return dataset;
+        }
+      }
+      return this.wrapped._run(dataset, config2);
+    }
+  };
+  if (0 in args) {
+    schema.default = args[0];
+  }
+  return schema;
+}
+
 // src/schemas/union/utils/_subIssues/_subIssues.ts
 function _subIssues(datasets) {
   let issues;
diff --git a/package.json b/package.json
index b87e79b..b2c0a53 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
   "dependencies": {
     "@actions/core": "1.10.1",
     "@actions/github": "6.0.0",
-    "valibot": "0.39.0"
+    "valibot": "0.40.0"
   },
   "devDependencies": {
     "@eslint/js": "9.9.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index efc7bcd..f17c8a5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -15,8 +15,8 @@ importers:
         specifier: 6.0.0
         version: 6.0.0
       valibot:
-        specifier: 0.39.0
-        version: 0.39.0(typescript@5.5.4)
+        specifier: 0.40.0
+        version: 0.40.0(typescript@5.5.4)
     devDependencies:
       '@eslint/js':
         specifier: 9.9.1
@@ -1878,8 +1878,8 @@ packages:
     resolution: {integrity: sha512-kiGUalWN+rgBJ/1OHZsBtU4rXZOfj/7rKQxULKlIzwzQSvMJUUNgPwJEEh7gU6xEVxC0ahoOBvN2YI8GH6FNgA==}
     engines: {node: '>=10.12.0'}
 
-  valibot@0.39.0:
-    resolution: {integrity: sha512-d+vE8SDRNy9zKg6No5MHz2tdz8H6CW8X3OdqYdmlhnoqQmEoM6Hu0hJUrZv3tPSVrzZkIIMCtdCQtMzcM6NCWw==}
+  valibot@0.40.0:
+    resolution: {integrity: sha512-XHKnaVtwHqxPwnGOsLrwka9CEaL7yNeLNp707OKv/bmT29GnPVdl6PxBOZ6BW7hF66/6QT6iVbOlnW7qVPmoKw==}
     peerDependencies:
       typescript: '>=5'
     peerDependenciesMeta:
@@ -4096,7 +4096,7 @@ snapshots:
       '@types/istanbul-lib-coverage': 2.0.6
       convert-source-map: 2.0.0
 
-  valibot@0.39.0(typescript@5.5.4):
+  valibot@0.40.0(typescript@5.5.4):
     optionalDependencies:
       typescript: 5.5.4