diff --git a/package.json b/package.json
index 8fa0129cb..9146d73c7 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
 		"@koa/cors": "3.0.0",
 		"@koa/multer": "2.0.2",
 		"@koa/router": "8.0.8",
-		"@syuilo/aiscript": "0.1.4",
+		"@syuilo/aiscript": "0.2.0",
 		"@types/bcryptjs": "2.4.2",
 		"@types/bull": "3.12.1",
 		"@types/cbor": "5.0.0",
diff --git a/src/client/components/page/page.vue b/src/client/components/page/page.vue
index 0f1769fc8..3723fcd3c 100644
--- a/src/client/components/page/page.vue
+++ b/src/client/components/page/page.vue
@@ -26,7 +26,7 @@ class Script {
 		this.aoiScript = aoiScript;
 		this.onError = onError;
 
-		if (this.page.script) {
+		if (this.page.script && this.aoiScript.aiscript) {
 			let ast;
 			try {
 				ast = parse(this.page.script);
@@ -49,8 +49,10 @@ class Script {
 				});*/
 			});
 		} else {
-			this.eval();
-			cb();
+			setTimeout(() => {
+				this.eval();
+				cb();
+			}, 1);
 		}
 	}
 
@@ -71,7 +73,7 @@ class Script {
 	}
 
 	public callAiScript(fn: string) {
-		this.aoiScript.aiscript.execFn(this.aoiScript.aiscript.scope.get(fn), []);
+		if (this.aoiScript.aiscript) this.aoiScript.aiscript.execFn(this.aoiScript.aiscript.scope.get(fn), []);
 	}
 }
 
@@ -103,18 +105,23 @@ export default Vue.extend({
 			randomSeed: Math.random(),
 			visitor: this.$store.state.i,
 			page: this.page,
-			url: url
+			url: url,
+			enableAiScript: !this.$store.state.device.disablePagesScript
 		}), e => {
 			console.dir(e);
 		}, () => {
 			this.script = s;
 		});
 
-		s.aoiScript.aiscript.scope.opts.onUpdated = (name, value) => {
+		if (s.aoiScript.aiscript) s.aoiScript.aiscript.scope.opts.onUpdated = (name, value) => {
 			s.eval();
 		};
 	},
 
+	beforeDestroy() {
+		if (this.script.aoiScript.aiscript) this.script.aoiScript.aiscript.abort();
+	},
+
 	methods: {
 		getPageVars() {
 			return collectPageVars(this.page.content);
diff --git a/src/client/pages/preferences/index.vue b/src/client/pages/preferences/index.vue
index 2b1b3083a..e6d0fd0fe 100644
--- a/src/client/pages/preferences/index.vue
+++ b/src/client/pages/preferences/index.vue
@@ -65,6 +65,7 @@
 				<template #desc><mfm text="🍮🍦🍭🍩🍰🍫🍬🥞🍪"/></template>
 			</mk-switch>
 			<mk-switch v-model="showFixedPostForm">{{ $t('showFixedPostForm') }}</mk-switch>
+			<mk-switch v-model="disablePagesScript">{{ $t('disablePagesScript') }}</mk-switch>
 		</div>
 		<div class="_content">
 			<mk-select v-model="lang">
@@ -171,6 +172,11 @@ export default Vue.extend({
 			set(value) { this.$store.commit('device/set', { key: 'imageNewTab', value }); }
 		},
 
+		disablePagesScript: {
+			get() { return this.$store.state.device.disablePagesScript; },
+			set(value) { this.$store.commit('device/set', { key: 'disablePagesScript', value }); }
+		},
+
 		showFixedPostForm: {
 			get() { return this.$store.state.device.showFixedPostForm; },
 			set(value) { this.$store.commit('device/set', { key: 'showFixedPostForm', value }); }
diff --git a/src/client/scripts/aoiscript/evaluator.ts b/src/client/scripts/aoiscript/evaluator.ts
index 8d8a5b2e0..40e62210b 100644
--- a/src/client/scripts/aoiscript/evaluator.ts
+++ b/src/client/scripts/aoiscript/evaluator.ts
@@ -17,41 +17,45 @@ export class ASEvaluator {
 	private variables: Variable[];
 	private pageVars: PageVar[];
 	private envVars: Record<keyof typeof envVarsDef, any>;
-	public aiscript: AiScript;
+	public aiscript: AiScript | undefined;
 	private pageVarUpdatedCallback;
 
 	private opts: {
 		randomSeed: string; visitor?: any; page?: any; url?: string;
+		enableAiScript: boolean;
 	};
 
 	constructor(vm: any, variables: Variable[], pageVars: PageVar[], opts: ASEvaluator['opts']) {
 		this.variables = variables;
 		this.pageVars = pageVars;
 		this.opts = opts;
-		this.aiscript = new AiScript({ ...createAiScriptEnv(vm, {
-			storageKey: 'pages:' + opts.page.id
-		}), ...{
-			'MkPages:updated': values.FN_NATIVE(([callback]) => {
-				this.pageVarUpdatedCallback = callback;
-			})
-		}}, {
-			in: (q) => {
-				return new Promise(ok => {
-					vm.$root.dialog({
-						title: q,
-						input: {}
-					}).then(({ canceled, result: a }) => {
-						ok(a);
+
+		if (this.opts.enableAiScript) {
+			this.aiscript = new AiScript({ ...createAiScriptEnv(vm, {
+				storageKey: 'pages:' + opts.page.id
+			}), ...{
+				'MkPages:updated': values.FN_NATIVE(([callback]) => {
+					this.pageVarUpdatedCallback = callback;
+				})
+			}}, {
+				in: (q) => {
+					return new Promise(ok => {
+						vm.$root.dialog({
+							title: q,
+							input: {}
+						}).then(({ canceled, result: a }) => {
+							ok(a);
+						});
 					});
-				});
-			},
-			out: (value) => {
-				console.log(value);
-			},
-			log: (type, params) => {
-			},
-			maxStep: 16384
-		});
+				},
+				out: (value) => {
+					console.log(value);
+				},
+				log: (type, params) => {
+				},
+				maxStep: 16384
+			});
+		}
 
 		const date = new Date();
 
@@ -79,7 +83,7 @@ export class ASEvaluator {
 		if (pageVar !== undefined) {
 			pageVar.value = value;
 			if (this.pageVarUpdatedCallback) {
-				this.aiscript.execFn(this.pageVarUpdatedCallback, [values.STR(name), utils.jsToVal(value)]);
+				if (this.aiscript) this.aiscript.execFn(this.pageVarUpdatedCallback, [values.STR(name), utils.jsToVal(value)]);
 			}
 		} else {
 			throw new AoiScriptError(`No such page var '${name}'`);
@@ -142,7 +146,11 @@ export class ASEvaluator {
 		}
 
 		if (block.type === 'aiScriptVar') {
-			return utils.valToJs(this.aiscript.scope.get(block.value));
+			if (this.aiscript) {
+				return utils.valToJs(this.aiscript.scope.get(block.value));
+			} else {
+				return null;
+			}
 		}
 
 		if (isFnBlock(block)) { // ユーザー関数定義
diff --git a/src/client/store.ts b/src/client/store.ts
index 14c854860..0b596ba41 100644
--- a/src/client/store.ts
+++ b/src/client/store.ts
@@ -42,6 +42,7 @@ const defaultDeviceSettings = {
 	animatedMfm: true,
 	imageNewTab: false,
 	showFixedPostForm: false,
+	disablePagesScript: true,
 	sfxVolume: 0.3,
 	sfxNote: 'syuilo/down',
 	sfxNoteMy: 'syuilo/up',
diff --git a/yarn.lock b/yarn.lock
index 598ea8ee5..724488a69 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -144,13 +144,15 @@
   dependencies:
     type-detect "4.0.8"
 
-"@syuilo/aiscript@0.1.4":
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/@syuilo/aiscript/-/aiscript-0.1.4.tgz#ff027552f32990ae3e29145ce6efe0a7a516b442"
-  integrity sha512-SMDlBInsGTL3DOe0U394X7na0N6ryYg0RGQPPtCVhXkJpVDZiaqUe5vDO+DkRyuRlkmBbN82LWToou19j/Uv8g==
+"@syuilo/aiscript@0.2.0":
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/@syuilo/aiscript/-/aiscript-0.2.0.tgz#dcb489bca13f6d965ac86034a45fd46514b1487a"
+  integrity sha512-N9fYchn3zjtniG9fNmZ81PwYZFdulk+RSBcjDZWBgHsFJQc1wxOCr9hZux/vSXrZ/ZWEzK0loNz1dorl2jJLeA==
   dependencies:
+    "@types/seedrandom" "2.4.28"
     autobind-decorator "2.4.0"
     chalk "4.0.0"
+    seedrandom "3.0.5"
     uuid "7.0.3"
 
 "@tokenizer/token@^0.1.0", "@tokenizer/token@^0.1.1":