diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
index 73c7a976..5190d47f 100644
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@@ -28,7 +28,7 @@ jobs:
 
       - uses: actions/setup-node@v6
         with:
-          node-version: 25.x
+          node-version: 26.x
           cache: npm
 
       - run: npm ci
diff --git a/README.md b/README.md
index 1ae340a8..4119fb65 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Du hast 2 Optionen: [Lokale installation](#lokale-installation) und [GitHub Code
 
 ### Lokale Installation
 
-<sub>node Version: >=25</sub>
+<sub>node Version: >=26</sub>
 
 1. Terminal aufmachen und dorthin navigieren, wo man es downloaden möchte
 2. Sichergehen, dass [Node.js](https://nodejs.org) installiert ist. Teste mit: `node --version`. Wenn es eine Versionsnummer zurückgibt, ist Node.js installiert.
diff --git a/package-lock.json b/package-lock.json
index 16a6b071..3d723b12 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,6 @@
       "license": "MIT",
       "dependencies": {
         "@discordjs/voice": "^0.19.2",
-        "@js-temporal/polyfill": "^0.5.1",
         "@napi-rs/canvas": "1.0.0",
         "@resvg/resvg-js": "^2.6.2",
         "@sentry/node": "^10.51.0",
@@ -44,7 +43,7 @@
         "oxlint-tsgolint": "^0.22.1"
       },
       "engines": {
-        "node": ">=25.6.1"
+        "node": ">=26"
       }
     },
     "node_modules/@asamuzakjp/css-color": {
@@ -750,18 +749,6 @@
         "node": "^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0"
       }
     },
-    "node_modules/@js-temporal/polyfill": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/@js-temporal/polyfill/-/polyfill-0.5.1.tgz",
-      "integrity": "sha512-hloP58zRVCRSpgDxmqCWJNlizAlUgJFqG2ypq79DCvyv9tHjRYMDOcPFjzfl/A1/YxDvRCZz8wvZvmapQnKwFQ==",
-      "license": "ISC",
-      "dependencies": {
-        "jsbi": "^4.3.0"
-      },
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/@kikobeats/time-span": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/@kikobeats/time-span/-/time-span-1.0.10.tgz",
@@ -4155,12 +4142,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/jsbi": {
-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/jsbi/-/jsbi-4.3.2.tgz",
-      "integrity": "sha512-9fqMSQbhJykSeii05nxKl4m6Eqn2P6rOlYiS+C5Dr/HPIU/7yZxu5qzbs40tgaFORiw2Amd0mirjxatXYMkIew==",
-      "license": "Apache-2.0"
-    },
     "node_modules/jsdom": {
       "version": "29.1.1",
       "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-29.1.1.tgz",
diff --git a/package.json b/package.json
index c8c41f6c..639391d5 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
   },
   "dependencies": {
     "@discordjs/voice": "^0.19.2",
-    "@js-temporal/polyfill": "^0.5.1",
     "@napi-rs/canvas": "1.0.0",
     "@resvg/resvg-js": "^2.6.2",
     "@sentry/node": "^10.51.0",
@@ -65,7 +64,7 @@
     "oxlint-tsgolint": "^0.22.1"
   },
   "engines": {
-    "node": ">=25.6.1"
+    "node": ">=26"
   },
   "trustedDependencies": [
     "lefthook"
diff --git a/src/polyfills.test.ts b/src/polyfills.test.ts
deleted file mode 100644
index 5f63c7ab..00000000
--- a/src/polyfills.test.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { describe, test } from "node:test";
-
-import { expect } from "expect";
-
-void describe("map polyfills", () => {
-    void test("getOrInsert", () => {
-        const m = new Map<string, unknown>();
-        expect(m.getOrInsert("hi", "lol")).toBe("lol");
-        expect(m.getOrInsert("hi", "nope")).toBe("lol");
-    });
-    void test("getOrInsertComputed", () => {
-        const m = new Map<string, unknown>();
-        expect(m.getOrInsertComputed("hi", k => `${k}-lol`)).toBe("hi-lol");
-        expect(m.getOrInsertComputed("hi", k => `${k}-nope`)).toBe("hi-lol");
-    });
-});
diff --git a/src/polyfills.ts b/src/polyfills.ts
index ec2e40c8..5630c7b9 100644
--- a/src/polyfills.ts
+++ b/src/polyfills.ts
@@ -1,5 +1,3 @@
-import { Temporal as PolyfillTemporal } from "@js-temporal/polyfill";
-
 declare global {
     // type polyfill for Math.sumPrecise (currently in stage 2):
     // https://github.com/tc39/proposal-math-sum
@@ -7,53 +5,9 @@ declare global {
     interface Math {
         sumPrecise: (values: number[]) => number;
     }
-
-    // https://github.com/tc39/proposal-upsert
-    interface Map<K, V> {
-        getOrInsert(key: K, defaultValue: V): V;
-        getOrInsertComputed<TK extends K>(key: TK, callbackFunction: (key: TK) => V): V;
-    }
-}
-
-globalThis.Temporal = PolyfillTemporal as typeof Temporal;
-
-// TODO: Remove this once temporal is available in Node.js, see: https://github.com/nodejs/node/issues/57127
-if (typeof Date.prototype.toTemporalInstant !== "function") {
-    Date.prototype.toTemporalInstant = function () {
-        return Temporal.Instant.fromEpochMilliseconds(this.getTime());
-    };
 }
 
 if (typeof Math.sumPrecise !== "function") {
     // intentionally very cheap implementation. But does the thing.
     Math.sumPrecise = (values: number[]) => values.reduce((a, b) => a + b, 0);
 }
-
-// https://github.com/tc39/proposal-upsert
-if (typeof Map.prototype.getOrInsert === "undefined") {
-    Map.prototype.getOrInsert = function <K, V>(this: Map<K, V>, key: K, defaultValue: V): V {
-        const v = this.get(key);
-        if (v !== undefined) {
-            return v;
-        }
-
-        this.set(key, defaultValue);
-        return defaultValue;
-    };
-}
-if (typeof Map.prototype.getOrInsertComputed === "undefined") {
-    Map.prototype.getOrInsertComputed = function <K, V>(
-        this: Map<K, V>,
-        key: K,
-        callbackFunction: (key: K) => V,
-    ): V {
-        const v = this.get(key);
-        if (v !== undefined) {
-            return v;
-        }
-
-        const defaultValue = callbackFunction(key);
-        this.set(key, defaultValue);
-        return defaultValue;
-    };
-}