diff --git a/packages/logic/package.json b/packages/logic/package.json
index 5a782b4..a14d11f 100644
--- a/packages/logic/package.json
+++ b/packages/logic/package.json
@@ -2,8 +2,15 @@
     "name": "@sammo-ts/logic",
     "private": true,
     "version": "0.0.0",
+    "type": "module",
     "main": "dist/index.js",
     "types": "dist/index.d.ts",
+    "exports": {
+        ".": {
+            "types": "./dist/index.d.ts",
+            "default": "./dist/index.js"
+        }
+    },
     "scripts": {
         "build": "tsc -p tsconfig.json",
         "dev": "node -e \"console.log('dev not configured')\"",
diff --git a/packages/logic/src/index.ts b/packages/logic/src/index.ts
index 99fd3aa..5371785 100644
--- a/packages/logic/src/index.ts
+++ b/packages/logic/src/index.ts
@@ -1,10 +1,10 @@
-export * from './domain/entities';
-export * from './ports/rng';
-export * from './ports/world';
-export * from './triggers';
-export * from './util/BytesLike';
-export * from './util/convertBytesLikeToArrayBuffer';
-export * from './util/convertBytesLikeToUint8Array';
-export * from './util/LiteHashDRBG';
-export * from './util/RNG';
-export * from './util/RandUtil';
+export * from './domain/entities.js';
+export * from './ports/rng.js';
+export * from './ports/world.js';
+export * from './triggers/index.js';
+export * from './util/BytesLike.js';
+export * from './util/convertBytesLikeToArrayBuffer.js';
+export * from './util/convertBytesLikeToUint8Array.js';
+export * from './util/LiteHashDRBG.js';
+export * from './util/RNG.js';
+export * from './util/RandUtil.js';
diff --git a/packages/logic/src/ports/world.ts b/packages/logic/src/ports/world.ts
index bb2c6d5..5e2be65 100644
--- a/packages/logic/src/ports/world.ts
+++ b/packages/logic/src/ports/world.ts
@@ -7,7 +7,7 @@ import type {
     GeneralId,
     Nation,
     NationId,
-} from '../domain/entities';
+} from '../domain/entities.js';
 
 export interface GeneralRepository<GeneralType extends General = General> {
     getById(id: GeneralId): Promise<GeneralType | null>;
diff --git a/packages/logic/src/triggers/general-action.ts b/packages/logic/src/triggers/general-action.ts
index 63466f6..414329c 100644
--- a/packages/logic/src/triggers/general-action.ts
+++ b/packages/logic/src/triggers/general-action.ts
@@ -1,5 +1,5 @@
-import type { GeneralTriggerState } from '../domain/entities';
-import { type GeneralActionContext, GeneralTriggerCaller } from './general';
+import type { GeneralTriggerState } from '../domain/entities.js';
+import { type GeneralActionContext, GeneralTriggerCaller } from './general.js';
 
 export interface GeneralActionModule<TriggerState extends GeneralTriggerState = GeneralTriggerState> {
     getName?(): string;
diff --git a/packages/logic/src/triggers/general.ts b/packages/logic/src/triggers/general.ts
index 224c537..32704b9 100644
--- a/packages/logic/src/triggers/general.ts
+++ b/packages/logic/src/triggers/general.ts
@@ -1,7 +1,7 @@
-import type { General, GeneralTriggerState } from '../domain/entities';
-import type { RandomGenerator } from '../ports/rng';
-import type { WorldStateRepository } from '../ports/world';
-import { TriggerCaller, type Trigger } from './core';
+import type { General, GeneralTriggerState } from '../domain/entities.js';
+import type { RandomGenerator } from '../ports/rng.js';
+import type { WorldStateRepository } from '../ports/world.js';
+import { TriggerCaller, type Trigger } from './core.js';
 
 export interface GeneralActionLogSink {
     push(message: string): void;
diff --git a/packages/logic/src/triggers/index.ts b/packages/logic/src/triggers/index.ts
index 5b8f1f2..03cfb21 100644
--- a/packages/logic/src/triggers/index.ts
+++ b/packages/logic/src/triggers/index.ts
@@ -1,3 +1,3 @@
-export * from './core';
-export * from './general';
-export * from './general-action';
+export * from './core.js';
+export * from './general.js';
+export * from './general-action.js';
diff --git a/packages/logic/src/util/LiteHashDRBG.ts b/packages/logic/src/util/LiteHashDRBG.ts
index f511ecd..ca8bb03 100644
--- a/packages/logic/src/util/LiteHashDRBG.ts
+++ b/packages/logic/src/util/LiteHashDRBG.ts
@@ -1,9 +1,9 @@
-import type { RNG } from './RNG';
+import type { RNG } from './RNG.js';
 
 import { sha512 } from 'js-sha512';
 
-import { convertBytesLikeToUint8Array } from './convertBytesLikeToUint8Array';
-import type { BytesLike } from './BytesLike';
+import { convertBytesLikeToUint8Array } from './convertBytesLikeToUint8Array.js';
+import type { BytesLike } from './BytesLike.js';
 
 const maxRngSupportBit = 53;
 const maxInt = 0x1f_ffff_ffff_ffff; //      NOTE: b 0, 10000110011, 11...11
@@ -111,7 +111,7 @@ export class LiteHashDRBG implements RNG {
 
     protected genNextBlock(): void {
         this.hq.setUint32(this.hqIdxPos, this.stateIdx, true);
-        const digest = sha512.arrayBuffer(this.hq.buffer);
+        const digest = sha512.arrayBuffer(this.hq.buffer as ArrayBuffer);
         this.buffer = digest;
         this.bufferIdx = 0;
         this.stateIdx += 1;
@@ -181,7 +181,7 @@ export class LiteHashDRBG implements RNG {
             return result;
         }
 
-        result[bytes - 1] &= 0xff >> (8 - headBits);
+        result[bytes - 1]! &= 0xff >> (8 - headBits);
         return result;
     }
 
diff --git a/packages/logic/src/util/RandUtil.ts b/packages/logic/src/util/RandUtil.ts
index 34db5a4..6ed934c 100644
--- a/packages/logic/src/util/RandUtil.ts
+++ b/packages/logic/src/util/RandUtil.ts
@@ -1,4 +1,4 @@
-import type { RNG } from './RNG';
+import type { RNG } from './RNG.js';
 
 // RNG 유틸리티 모음
 export class RandUtil {
@@ -25,8 +25,8 @@ export class RandUtil {
     }
 
     public nextBit(): boolean {
-        const view = new DataView(this.rng.nextBits(1) as ArrayBufferLike);
-        return view.getUint8(0) != 0;
+        const bits = this.rng.nextBits(1);
+        return bits[0]! != 0;
     }
 
     public nextBool(prob = 0.5): boolean {
@@ -57,7 +57,10 @@ export class RandUtil {
             if (srcIdx === destIdx) {
                 continue;
             }
-            [result[srcIdx], result[destIdx]] = [result[destIdx], result[srcIdx]];
+            const srcValue = result[srcIdx]!;
+            const destValue = result[destIdx]!;
+            result[srcIdx] = destValue;
+            result[destIdx] = srcValue;
         }
 
         return result;
@@ -71,14 +74,15 @@ export class RandUtil {
                 throw new Error('Empty items');
             }
             const idx = this.rng.nextInt(items.length - 1);
-            return items[idx];
+            return items[idx]!;
         }
 
         if (items instanceof Set) {
             return this.choice(Array.from(items.values()));
         }
 
-        return items[this.choice(Array.from(Object.keys(items)))];
+        const key = this.choice(Array.from(Object.keys(items))) as keyof typeof items;
+        return items[key]!;
     }
 
     public choiceUsingWeight(items: Record<string | number, number>): string | number {
diff --git a/packages/logic/src/util/convertBytesLikeToArrayBuffer.ts b/packages/logic/src/util/convertBytesLikeToArrayBuffer.ts
index f7326f7..eef3bc9 100644
--- a/packages/logic/src/util/convertBytesLikeToArrayBuffer.ts
+++ b/packages/logic/src/util/convertBytesLikeToArrayBuffer.ts
@@ -1,11 +1,22 @@
-import type { BytesLike } from './BytesLike';
+import type { BytesLike } from './BytesLike.js';
 
 export function convertBytesLikeToArrayBuffer(data: BytesLike, encodeUTF8 = true): ArrayBuffer {
     if (data instanceof ArrayBuffer) {
         return data;
     }
     if (data instanceof Uint8Array) {
-        return data.buffer;
+        if (
+            data.byteOffset === 0
+            && data.byteLength === data.buffer.byteLength
+            && data.buffer instanceof ArrayBuffer
+        ) {
+            return data.buffer;
+        }
+        return data.slice().buffer;
+    }
+    if (data instanceof DataView) {
+        const view = new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
+        return view.slice().buffer;
     }
     if (typeof (data) === 'string') {
         if (encodeUTF8) {
@@ -13,5 +24,5 @@ export function convertBytesLikeToArrayBuffer(data: BytesLike, encodeUTF8 = true
         }
         return new Uint8Array(data.split('').map((s) => s.codePointAt(0) as number)).buffer;
     }
-    return data.buffer;
+    throw new Error('Unsupported BytesLike');
 }
diff --git a/packages/logic/src/util/convertBytesLikeToUint8Array.ts b/packages/logic/src/util/convertBytesLikeToUint8Array.ts
index c3c27ca..5caf8fc 100644
--- a/packages/logic/src/util/convertBytesLikeToUint8Array.ts
+++ b/packages/logic/src/util/convertBytesLikeToUint8Array.ts
@@ -1,4 +1,4 @@
-import type { BytesLike } from './BytesLike';
+import type { BytesLike } from './BytesLike.js';
 
 export function convertBytesLikeToUint8Array(data: BytesLike, encodeUTF8 = true): Uint8Array {
     if (data instanceof Uint8Array) {
diff --git a/packages/logic/test/rng.test.ts b/packages/logic/test/rng.test.ts
index ad28acd..4778459 100644
--- a/packages/logic/test/rng.test.ts
+++ b/packages/logic/test/rng.test.ts
@@ -1,9 +1,9 @@
 import chai, { assert } from 'chai';
 import chaiBytes from 'chai-bytes';
-import { bufferByteSize, LiteHashDRBG } from '../src/util/LiteHashDRBG';
-import { RandUtil } from '../src/util/RandUtil';
-import { convertBytesLikeToArrayBuffer } from '../src/util/convertBytesLikeToArrayBuffer';
-import { convertBytesLikeToUint8Array as toBytes } from '../src/util/convertBytesLikeToUint8Array';
+import { bufferByteSize, LiteHashDRBG } from '../src/util/LiteHashDRBG.js';
+import { RandUtil } from '../src/util/RandUtil.js';
+import { convertBytesLikeToArrayBuffer } from '../src/util/convertBytesLikeToArrayBuffer.js';
+import { convertBytesLikeToUint8Array as toBytes } from '../src/util/convertBytesLikeToUint8Array.js';
 import _ from 'lodash-es';
 
 chai.use(chaiBytes);
diff --git a/packages/logic/tsconfig.json b/packages/logic/tsconfig.json
index 2c11d91..00ee3aa 100644
--- a/packages/logic/tsconfig.json
+++ b/packages/logic/tsconfig.json
@@ -3,7 +3,20 @@
     "compilerOptions": {
         "outDir": "dist",
         "rootDir": "src",
-        "composite": true
+        "composite": true,
+        "module": "NodeNext",
+        "moduleResolution": "NodeNext",
+        "target": "ES2023",
+        "lib": ["ES2024"],
+        "verbatimModuleSyntax": true,
+        "noUncheckedIndexedAccess": true,
+        "exactOptionalPropertyTypes": true,
+        "noImplicitOverride": true,
+        "noImplicitReturns": true,
+        "noFallthroughCasesInSwitch": true,
+        "useUnknownInCatchVariables": true,
+        "noUnusedLocals": true,
+        "noUnusedParameters": true
     },
     "include": ["src"]
 }