diff --git a/deno.jsonc b/deno.jsonc
index 9d2c33f..c75dfd0 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -1,3 +1,4 @@
 {
-    "fmt": { "indentWidth": 4 }
+    "fmt": { "indentWidth": 4 },
+    "lib": ["dom", "dom.iterable", "dom.asynciterable", "deno.ns"]
 }
diff --git a/js/code-runner.js b/js/code-runner.js
index ea2233f..c860d58 100644
--- a/js/code-runner.js
+++ b/js/code-runner.js
@@ -14,10 +14,12 @@ export class CodeRunner {
         this.console.log("Running code...");
 
         // Stored globally so lib.js can access it
-        window.libInternalAbortController = new AbortController();
+        globalThis.libInternalAbortController = new AbortController();
 
         // Use RNG to prevent caching
-        const encodedText = encodeURIComponent(this.code + `/*(tph): ${Math.random()}*/`);
+        const encodedText = encodeURIComponent(
+            this.code + `/*(tph): ${Math.random()}*/`,
+        );
 
         try {
             await import(`data:text/javascript;charset=utf-8,${encodedText}`);
@@ -29,7 +31,7 @@ export class CodeRunner {
     stop() {
         this.isRunning = false;
 
-        window.libInternalAbortController?.abort();
+        globalThis.libInternalAbortController?.abort();
     }
 
     toggle() {
@@ -37,4 +39,3 @@ export class CodeRunner {
         else this.run();
     }
 }
-
diff --git a/js/index.js b/js/index.js
index 46e88e9..3379c0d 100644
--- a/js/index.js
+++ b/js/index.js
@@ -4,7 +4,9 @@ import { Debounce } from "./debounce.js";
 import { PlaygroundConsole } from "./playground-console.js";
 import { CodeRunner } from "./code-runner.js";
 
-const playgroundConsole = new PlaygroundConsole(document.querySelector("#console-code"));
+const playgroundConsole = new PlaygroundConsole(
+    document.querySelector("#console-code"),
+);
 const codeRunner = new CodeRunner(playgroundConsole);
 
 const editor = ace.edit("editor");
diff --git a/js/lib.js b/js/lib.js
index 9ede8e6..12942f1 100644
--- a/js/lib.js
+++ b/js/lib.js
@@ -40,7 +40,7 @@ export function startGameLoop(loopFunction) {
         loopFunction(deltaT);
     }, 16);
 
-    const abortSignal = window.libInternalAbortController.signal;
+    const abortSignal = globalThis.libInternalAbortController.signal;
     if (abortSignal) {
         if (abortSignal.aborted) {
             clearInterval(loopInterval);
diff --git a/js/playground-console.js b/js/playground-console.js
index 2191731..5929708 100644
--- a/js/playground-console.js
+++ b/js/playground-console.js
@@ -7,4 +7,3 @@ export class PlaygroundConsole {
         this.elem.textContent += `\n${text}\n`;
     }
 }
-