diff --git a/src/client/.eslintrc b/src/client/.eslintrc
index baff352604..5ea3dc45d6 100644
--- a/src/client/.eslintrc
+++ b/src/client/.eslintrc
@@ -3,6 +3,8 @@
 		"_DEV_": false,
 		"_LANGS_": false,
 		"_VERSION_": false,
-		"_ENV_": false
+		"_ENV_": false,
+		"_DATA_TRANSFER_DRIVE_FILE_": false,
+		"_DATA_TRANSFER_DRIVE_FOLDER_": false
 	}
 }
diff --git a/src/client/@types/global.d.ts b/src/client/@types/global.d.ts
index 9f600268c8..8b7c4356d6 100644
--- a/src/client/@types/global.d.ts
+++ b/src/client/@types/global.d.ts
@@ -2,3 +2,5 @@ declare const _LANGS_: string[];
 declare const _VERSION_: string;
 declare const _ENV_: string;
 declare const _DEV_: boolean;
+declare const _DATA_TRANSFER_DRIVE_FILE_: string;
+declare const _DATA_TRANSFER_DRIVE_FOLDER_: string;
diff --git a/src/client/components/drive.file.vue b/src/client/components/drive.file.vue
index 56dce1f3b0..1a55bb6e7f 100644
--- a/src/client/components/drive.file.vue
+++ b/src/client/components/drive.file.vue
@@ -116,7 +116,7 @@ export default defineComponent({
 
 		onDragstart(e) {
 			e.dataTransfer.effectAllowed = 'move';
-			e.dataTransfer.setData('mk_drive_file', JSON.stringify(this.file));
+			e.dataTransfer.setData(_DATA_TRANSFER_DRIVE_FILE_, JSON.stringify(this.file));
 			this.isDragging = true;
 
 			// 親ブラウザに対して、ドラッグが開始されたフラグを立てる
diff --git a/src/client/components/drive.folder.vue b/src/client/components/drive.folder.vue
index c02d6df6b2..291e813288 100644
--- a/src/client/components/drive.folder.vue
+++ b/src/client/components/drive.folder.vue
@@ -92,8 +92,8 @@ export default defineComponent({
 			}
 
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
-			const isDriveFolder = e.dataTransfer.types[0] == 'mk_drive_folder';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
+			const isDriveFolder = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FOLDER_;
 
 			if (isFile || isDriveFile || isDriveFolder) {
 				e.dataTransfer.dropEffect = e.dataTransfer.effectAllowed == 'all' ? 'copy' : 'move';
@@ -122,7 +122,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				const file = JSON.parse(driveFile);
 				this.browser.removeFile(file.id);
@@ -134,7 +134,7 @@ export default defineComponent({
 			//#endregion
 
 			//#region ドライブのフォルダ
-			const driveFolder = e.dataTransfer.getData('mk_drive_folder');
+			const driveFolder = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FOLDER_);
 			if (driveFolder != null && driveFolder != '') {
 				const folder = JSON.parse(driveFolder);
 
@@ -168,7 +168,7 @@ export default defineComponent({
 
 		onDragstart(e) {
 			e.dataTransfer.effectAllowed = 'move';
-			e.dataTransfer.setData('mk_drive_folder', JSON.stringify(this.folder));
+			e.dataTransfer.setData(_DATA_TRANSFER_DRIVE_FOLDER_, JSON.stringify(this.folder));
 			this.isDragging = true;
 
 			// 親ブラウザに対して、ドラッグが開始されたフラグを立てる
diff --git a/src/client/components/drive.nav-folder.vue b/src/client/components/drive.nav-folder.vue
index 145e8b9aae..e5e2ee15a2 100644
--- a/src/client/components/drive.nav-folder.vue
+++ b/src/client/components/drive.nav-folder.vue
@@ -59,8 +59,8 @@ export default defineComponent({
 			}
 
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
-			const isDriveFolder = e.dataTransfer.types[0] == 'mk_drive_folder';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
+			const isDriveFolder = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FOLDER_;
 
 			if (isFile || isDriveFile || isDriveFolder) {
 				e.dataTransfer.dropEffect = e.dataTransfer.effectAllowed == 'all' ? 'copy' : 'move';
@@ -91,7 +91,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				const file = JSON.parse(driveFile);
 				this.browser.removeFile(file.id);
@@ -103,7 +103,7 @@ export default defineComponent({
 			//#endregion
 
 			//#region ドライブのフォルダ
-			const driveFolder = e.dataTransfer.getData('mk_drive_folder');
+			const driveFolder = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FOLDER_);
 			if (driveFolder != null && driveFolder != '') {
 				const folder = JSON.parse(driveFolder);
 				// 移動先が自分自身ならreject
diff --git a/src/client/components/drive.vue b/src/client/components/drive.vue
index 05ab302c91..4e74cddd3a 100644
--- a/src/client/components/drive.vue
+++ b/src/client/components/drive.vue
@@ -222,8 +222,8 @@ export default defineComponent({
 			}
 
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
-			const isDriveFolder = e.dataTransfer.types[0] == 'mk_drive_folder';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
+			const isDriveFolder = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FOLDER_;
 
 			if (isFile || isDriveFile || isDriveFolder) {
 				e.dataTransfer.dropEffect = e.dataTransfer.effectAllowed == 'all' ? 'copy' : 'move';
@@ -254,7 +254,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				const file = JSON.parse(driveFile);
 				if (this.files.some(f => f.id == file.id)) return;
@@ -267,7 +267,7 @@ export default defineComponent({
 			//#endregion
 
 			//#region ドライブのフォルダ
-			const driveFolder = e.dataTransfer.getData('mk_drive_folder');
+			const driveFolder = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FOLDER_);
 			if (driveFolder != null && driveFolder != '') {
 				const folder = JSON.parse(driveFolder);
 
diff --git a/src/client/components/post-form.vue b/src/client/components/post-form.vue
index 073a31aa82..88bf552612 100644
--- a/src/client/components/post-form.vue
+++ b/src/client/components/post-form.vue
@@ -496,7 +496,7 @@ export default defineComponent({
 		onDragover(e) {
 			if (!e.dataTransfer.items[0]) return;
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
 			if (isFile || isDriveFile) {
 				e.preventDefault();
 				this.draghover = true;
@@ -523,7 +523,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				const file = JSON.parse(driveFile);
 				this.files.push(file);
diff --git a/src/client/pages/messaging/messaging-room.form.vue b/src/client/pages/messaging/messaging-room.form.vue
index fd4119a727..90783dab8c 100644
--- a/src/client/pages/messaging/messaging-room.form.vue
+++ b/src/client/pages/messaging/messaging-room.form.vue
@@ -122,7 +122,7 @@ export default defineComponent({
 
 		onDragover(e) {
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
 			if (isFile || isDriveFile) {
 				e.preventDefault();
 				e.dataTransfer.dropEffect = e.dataTransfer.effectAllowed == 'all' ? 'copy' : 'move';
@@ -145,7 +145,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				this.file = JSON.parse(driveFile);
 				e.preventDefault();
diff --git a/src/client/pages/messaging/messaging-room.vue b/src/client/pages/messaging/messaging-room.vue
index c6bfdb5afd..ac00554797 100644
--- a/src/client/pages/messaging/messaging-room.vue
+++ b/src/client/pages/messaging/messaging-room.vue
@@ -130,7 +130,7 @@ export default defineComponent({
 
 		onDragover(e) {
 			const isFile = e.dataTransfer.items[0].kind == 'file';
-			const isDriveFile = e.dataTransfer.types[0] == 'mk_drive_file';
+			const isDriveFile = e.dataTransfer.types[0] == _DATA_TRANSFER_DRIVE_FILE_;
 
 			if (isFile || isDriveFile) {
 				e.dataTransfer.dropEffect = e.dataTransfer.effectAllowed == 'all' ? 'copy' : 'move';
@@ -153,7 +153,7 @@ export default defineComponent({
 			}
 
 			//#region ドライブのファイル
-			const driveFile = e.dataTransfer.getData('mk_drive_file');
+			const driveFile = e.dataTransfer.getData(_DATA_TRANSFER_DRIVE_FILE_);
 			if (driveFile != null && driveFile != '') {
 				const file = JSON.parse(driveFile);
 				this.form.file = file;
diff --git a/webpack.config.ts b/webpack.config.ts
index 2674203b4b..23c193c6b3 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -134,6 +134,8 @@ module.exports = {
 			_LANGS_: JSON.stringify(Object.entries(locales).map(([k, v]: [string, any]) => [k, v._lang_])),
 			_ENV_: JSON.stringify(process.env.NODE_ENV),
 			_DEV_: JSON.stringify(process.env.NODE_ENV) !== 'production',
+			_DATA_TRANSFER_DRIVE_FILE_: JSON.stringify('mk_drive_file'),
+			_DATA_TRANSFER_DRIVE_FOLDER_: JSON.stringify('mk_drive_folder'),
 		}),
 		new VueLoaderPlugin(),
 		new WebpackOnBuildPlugin((stats: any) => {