diff --git a/app/generators/uuid/page.tsx b/app/generators/uuid/page.tsx
index cec2c1a..5251745 100644
--- a/app/generators/uuid/page.tsx
+++ b/app/generators/uuid/page.tsx
@@ -2,7 +2,6 @@
 
 import { useCallback, useState } from "react";
 import { range } from "fp-ts/NonEmptyArray";
-import * as t from "io-ts";
 
 import { toolGroups } from "@/config/tools";
 import { uuid } from "@/lib/uuid";
@@ -26,8 +25,11 @@ const versions = {
   v4: "4",
 } as const;
 
-const uuidVersions = t.keyof({ [versions.v1]: null, [versions.v4]: null });
-type UuidVersion = t.TypeOf<typeof uuidVersions>;
+type UuidVersion = (typeof versions)[keyof typeof versions];
+
+function isUuidVersion(s: string): s is UuidVersion {
+  return Object.values(versions).includes(s as UuidVersion);
+}
 
 export default function Page() {
   const [hyphens, setHyphens] = useState(true);
@@ -42,7 +44,7 @@ export default function Page() {
   const clearUuids = useCallback(() => setUuids([]), []);
 
   const onUuidVersionChange: NonNullable<Select.Props["onValueChange"]> = useCallback(value => {
-    if (uuidVersions.is(value)) {
+    if (isUuidVersion(value)) {
       setUuidVersion(value);
     }
   }, []);
diff --git a/package.json b/package.json
index b9ca3a8..8bce879 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,6 @@
     "fp-ts": "^2.16.0",
     "fuse.js": "^6.6.2",
     "html-escaper": "^3.0.3",
-    "io-ts": "^2.2.20",
     "js-base64": "^3.7.5",
     "js-yaml": "^4.1.0",
     "jwt-decode": "^3.1.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 11fbc80..0c284e3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -43,9 +43,6 @@ dependencies:
   html-escaper:
     specifier: ^3.0.3
     version: 3.0.3
-  io-ts:
-    specifier: ^2.2.20
-    version: 2.2.20(fp-ts@2.16.0)
   js-base64:
     specifier: ^3.7.5
     version: 3.7.5
@@ -3427,14 +3424,6 @@ packages:
       loose-envify: 1.4.0
     dev: false
 
-  /io-ts@2.2.20(fp-ts@2.16.0):
-    resolution: {integrity: sha512-Rq2BsYmtwS5vVttie4rqrOCIfHCS9TgpRLFpKQCM1wZBBRY9nWVGmEvm2FnDbSE2un1UE39DvFpTR5UL47YDcA==}
-    peerDependencies:
-      fp-ts: ^2.5.0
-    dependencies:
-      fp-ts: 2.16.0
-    dev: false
-
   /is-arguments@1.1.1:
     resolution: {integrity: sha512-8Q7EARjzEnKpt/PCD7e1cgUS0a6X8u5tdSiMqXhojOdoV9TsMsiO+9VLC5vAmO8N7/GmXn7yjR8qnA6bVAEzfA==}
     engines: {node: '>= 0.4'}