diff --git a/.github/actions/setup-js-env/action.yml b/.github/actions/setup-js-env/action.yml
index 0cfa572a6a..da84e49a3e 100644
--- a/.github/actions/setup-js-env/action.yml
+++ b/.github/actions/setup-js-env/action.yml
@@ -5,7 +5,7 @@ runs:
   steps:
     - uses: actions/setup-node@v3
       with:
-        node-version: '18.18.2'
+        node-version: '20'
         cache: 'npm'
         cache-dependency-path: 'package-lock.json'
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bcde52b524..2de2c6895d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -76,14 +76,18 @@ and on the server-side (GitHub).
 You will need to [install](README.md#npm-and-webpack) `nodejs` and run `npm install`
 in order to install local versions of husky, lint-staged, and eslint.
 
-It is recommended that you also install ts-node and typescript globally, e.g.
+It is recommended that you also install typescript globally, e.g.
 
 ```shell
 npm install -g typescript
-npm install -g ts-node
 ```
 
-This will let you run commands as `ts-node` directly instead of `npx ts-node`.
+Most commands have npm versions of them, e.g. `npm test` or `npm lint`
+You must pass a `--loader` parameter to make these scripts run.
+
+```shell
+node --loader=ts-node/esm util/sync_files.ts
+```
 
 If the pre-commit validations are causing you significant problems,
 feel free to bypass the checks with `--no-verify` flag,
diff --git a/README.md b/README.md
index 2d6b40b4c2..c9717c3036 100644
--- a/README.md
+++ b/README.md
@@ -173,7 +173,7 @@ To install dependencies there are 2 methods: **per script** and **manually**
 ### Dependencies: Script Method
 
 1. `curl` MUST be installed (this is used to download dependencies)
-1. Execute `ts-node ./util/fetch_deps.ts` script
+1. Execute `node --loader=ts-node/esm util/fetch_deps.ts` script
 1. Continue with **Steps to build**
 
 ### Dependencies: Manual Method
diff --git a/docs/PatchUpdateChecklist.md b/docs/PatchUpdateChecklist.md
index 9243d5aeca..092c9ea599 100644
--- a/docs/PatchUpdateChecklist.md
+++ b/docs/PatchUpdateChecklist.md
@@ -64,9 +64,9 @@ python util/gen_zone_id_and_info.py
 python util/gen_weather_rate.py
 python util/gen_hunt_data.py
 
-ts-node util/gen_effect_id.ts
-ts-node util/gen_world_ids.ts
-ts-node util/gen_pet_names.ts
+node --loader=ts-node/esm util/gen_effect_id.ts
+node --loader=ts-node/esm util/gen_world_ids.ts
+node --loader=ts-node/esm util/gen_pet_names.ts
 ```
 
 Here's an example: <https://github.com/quisquous/cactbot/pull/5823/files>
diff --git a/docs/ko-KR/README.md b/docs/ko-KR/README.md
index 655f65850d..dae7f53e69 100644
--- a/docs/ko-KR/README.md
+++ b/docs/ko-KR/README.md
@@ -174,7 +174,7 @@ cactbot은 테스트 UI를 기본으로 제공합니다.
 ### 의존성 설치: 스크립트 방식
 
 1. `curl`이 반드시 설치되어 있어야 합니다. (의존성 파일들을 다운로드하기 위해 사용됩니다.)
-1. `ts-node ./util/fetch_deps.ts` 스크립트를 실행하세요.
+1. `node --import node --loader=ts-node/esm ./util/fetch_deps.ts` 스크립트를 실행하세요.
 1. **빌드하는 단계**로 이동하세요.
 
 ### 의존성 설치: 수동
diff --git a/docs/zh-CN/README.md b/docs/zh-CN/README.md
index 9efbadf22e..d126b16f00 100644
--- a/docs/zh-CN/README.md
+++ b/docs/zh-CN/README.md
@@ -145,7 +145,7 @@ cactbot 提供以下模块：
 ### 安装依赖：脚本方式
 
 1. 必须先安装 `curl`（用于下载依赖项）
-1. 运行 `ts-node ./util/fetch_deps.ts` 脚本
+1. 运行 `node --import node --loader=ts-node/esm ./util/fetch_deps.ts` 脚本
 1. 下转 **构建步骤**
 
 ### 安装依赖：手动方式
diff --git a/package.json b/package.json
index 15e2e949c7..4eab6424b0 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "build": "webpack --progress --config webpack/webpack.prod.ts",
     "build-gh-pages": " webpack --config webpack/webpack.ghpages.ts",
     "start": "webpack serve --config webpack/webpack.dev.ts",
-    "fetch-deps": "ts-node ./util/fetch_deps.ts",
+    "fetch-deps": "node --loader=ts-node/esm ./util/fetch_deps.ts",
     "tsc-no-emit": "tsc --noEmit",
     "lint": "run-s lint:**",
     "lint:dprint": "dprint check",
@@ -31,17 +31,17 @@
     "stylelintfix": "stylelint --fix \"resources/**/*.css\" \"ui/**/*.css\" \"user/**/*.css\" \"test/**/*.css\" \"util/**/*.css\"",
     "markdownlint": "markdownlint . --ignore node_modules --ignore publish --ignore plugin/ThirdParty",
     "test": "mocha",
-    "sync-files": "ts-node util/sync_files.ts && git diff --exit-code",
+    "sync-files": "node --loader=ts-node/esm util/sync_files.ts && git diff --exit-code",
     "lint-staged": "lint-staged",
-    "coverage-report": "ts-node util/gen_coverage_report.ts",
-    "util": "ts-node util/index.ts",
+    "coverage-report": "node --loader=ts-node/esm util/gen_coverage_report.ts",
+    "util": "node --loader=ts-node/esm util/index.ts",
     "find-translations": "npm run util -- findTranslations",
     "translate-timeline": "npm run util -- translateTimeline",
     "generate": "npm run util -- generate",
-    "process-triggers": "ts-node util/process_triggers_folder.ts",
-    "generate-log-guide": "ts-node util/gen_log_guide.ts",
-    "validate-versions": "ts-node util/validate_versions.ts",
-    "version": "ts-node util/bump_version.ts"
+    "process-triggers": "node --loader=ts-node/esm util/process_triggers_folder.ts",
+    "generate-log-guide": "node --loader=ts-node/esm util/gen_log_guide.ts",
+    "validate-versions": "node --loader=ts-node/esm util/validate_versions.ts",
+    "version": "node --loader=ts-node/esm util/bump_version.ts"
   },
   "devDependencies": {
     "@actions/exec": "^1.1.1",
@@ -121,7 +121,7 @@
     "webpack-merge": "^5.8.0"
   },
   "engines": {
-    "node": ">=18.10.0 <18.19"
+    "node": ">=20.10.0"
   },
   "stylelint": {
     "extends": "stylelint-config-standard"
@@ -145,7 +145,7 @@
     "*.md": "markdownlint",
     "*.py": "python -m pylint --errors-only",
     "ui/(raidboss|oopsyraidsy)/data/**": [
-      "ts-node test/test_data_files.ts"
+      "node --loader=ts-node/esm test/test_data_files.ts"
     ]
   },
   "dependencies": {
diff --git a/ui/oopsyraidsy/data/06-ew/dungeon/another_aloalo_island-savage.ts b/ui/oopsyraidsy/data/06-ew/dungeon/another_aloalo_island-savage.ts
index 3e7f67273f..cfe0dec848 100644
--- a/ui/oopsyraidsy/data/06-ew/dungeon/another_aloalo_island-savage.ts
+++ b/ui/oopsyraidsy/data/06-ew/dungeon/another_aloalo_island-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/06-ew/dungeon/another_aloalo_island.ts
diff --git a/ui/oopsyraidsy/data/06-ew/dungeon/another_mount_rokkon-savage.ts b/ui/oopsyraidsy/data/06-ew/dungeon/another_mount_rokkon-savage.ts
index 34d741993f..befeb6d3d0 100644
--- a/ui/oopsyraidsy/data/06-ew/dungeon/another_mount_rokkon-savage.ts
+++ b/ui/oopsyraidsy/data/06-ew/dungeon/another_mount_rokkon-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/06-ew/dungeon/another_mount_rokkon.ts
diff --git a/ui/oopsyraidsy/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts b/ui/oopsyraidsy/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
index e798abe744..0761f7e9e7 100644
--- a/ui/oopsyraidsy/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
+++ b/ui/oopsyraidsy/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/06-ew/dungeon/another_sildihn_subterrane.ts
diff --git a/ui/oopsyraidsy/data/06-ew/trial/sophia-un.ts b/ui/oopsyraidsy/data/06-ew/trial/sophia-un.ts
index 51005990a8..54053749fe 100644
--- a/ui/oopsyraidsy/data/06-ew/trial/sophia-un.ts
+++ b/ui/oopsyraidsy/data/06-ew/trial/sophia-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/03-hw/trial/sophia-ex.ts
diff --git a/ui/oopsyraidsy/data/06-ew/trial/thordan-un.ts b/ui/oopsyraidsy/data/06-ew/trial/thordan-un.ts
index d3bdf530fd..dfdc03abb1 100644
--- a/ui/oopsyraidsy/data/06-ew/trial/thordan-un.ts
+++ b/ui/oopsyraidsy/data/06-ew/trial/thordan-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/03-hw/trial/thordan-ex.ts
diff --git a/ui/oopsyraidsy/data/06-ew/trial/zurvan-un.ts b/ui/oopsyraidsy/data/06-ew/trial/zurvan-un.ts
index f0e5048ae8..62e3d811eb 100644
--- a/ui/oopsyraidsy/data/06-ew/trial/zurvan-un.ts
+++ b/ui/oopsyraidsy/data/06-ew/trial/zurvan-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/oopsyraidsy/data/03-hw/trial/zurvan-ex.ts
diff --git a/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.ts b/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.ts
index 21803d61cd..ba478473e8 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.ts
+++ b/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/06-ew/dungeon/another_aloalo_island.ts
diff --git a/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.txt b/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.txt
index 1064e596a5..efa7537d32 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.txt
+++ b/ui/raidboss/data/06-ew/dungeon/another_aloalo_island-savage.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/06-ew/dungeon/another_aloalo_island.txt
diff --git a/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.ts b/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.ts
index b156b6a045..ae4bdb593b 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.ts
+++ b/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/06-ew/dungeon/another_mount_rokkon.ts
diff --git a/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.txt b/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.txt
index 82cc90482e..b98970c574 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.txt
+++ b/ui/raidboss/data/06-ew/dungeon/another_mount_rokkon-savage.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/06-ew/dungeon/another_mount_rokkon.txt
diff --git a/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts b/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
index dd0e8732a1..5429ecc04e 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
+++ b/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane.ts
diff --git a/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.txt b/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.txt
index 2a6f3333ba..8962f83f88 100644
--- a/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.txt
+++ b/ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane-savage.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/06-ew/dungeon/another_sildihn_subterrane.txt
diff --git a/ui/raidboss/data/06-ew/trial/sophia-un.ts b/ui/raidboss/data/06-ew/trial/sophia-un.ts
index b3ed1ecfd1..235c4ad73d 100644
--- a/ui/raidboss/data/06-ew/trial/sophia-un.ts
+++ b/ui/raidboss/data/06-ew/trial/sophia-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/03-hw/trial/sophia-ex.ts
diff --git a/ui/raidboss/data/06-ew/trial/sophia-un.txt b/ui/raidboss/data/06-ew/trial/sophia-un.txt
index 92d75c9c6a..c825513ede 100644
--- a/ui/raidboss/data/06-ew/trial/sophia-un.txt
+++ b/ui/raidboss/data/06-ew/trial/sophia-un.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/03-hw/trial/sophia-ex.txt
diff --git a/ui/raidboss/data/06-ew/trial/thordan-un.ts b/ui/raidboss/data/06-ew/trial/thordan-un.ts
index f65eaf670c..85fe679998 100644
--- a/ui/raidboss/data/06-ew/trial/thordan-un.ts
+++ b/ui/raidboss/data/06-ew/trial/thordan-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/03-hw/trial/thordan-ex.ts
diff --git a/ui/raidboss/data/06-ew/trial/thordan-un.txt b/ui/raidboss/data/06-ew/trial/thordan-un.txt
index 384fb1b783..960ea554ba 100644
--- a/ui/raidboss/data/06-ew/trial/thordan-un.txt
+++ b/ui/raidboss/data/06-ew/trial/thordan-un.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/03-hw/trial/thordan-ex.txt
diff --git a/ui/raidboss/data/06-ew/trial/zurvan-un.ts b/ui/raidboss/data/06-ew/trial/zurvan-un.ts
index 1104dc6371..e8eced40b7 100644
--- a/ui/raidboss/data/06-ew/trial/zurvan-un.ts
+++ b/ui/raidboss/data/06-ew/trial/zurvan-un.ts
@@ -1,4 +1,4 @@
-// This file was autogenerated from running ts-node util/sync_files.ts.
+// This file was autogenerated from running npm run sync-files.
 // DO NOT EDIT THIS FILE DIRECTLY.
 // Edit the source file below and then run `npm run sync-files`
 // Source: ui/raidboss/data/03-hw/trial/zurvan-ex.ts
diff --git a/ui/raidboss/data/06-ew/trial/zurvan-un.txt b/ui/raidboss/data/06-ew/trial/zurvan-un.txt
index 5f88cee6fa..a34ebf0d59 100644
--- a/ui/raidboss/data/06-ew/trial/zurvan-un.txt
+++ b/ui/raidboss/data/06-ew/trial/zurvan-un.txt
@@ -1,4 +1,4 @@
-# This file was autogenerated from running ts-node util/sync_files.ts.
+# This file was autogenerated from running npm run sync-files.
 # DO NOT EDIT THIS FILE DIRECTLY.
 # Edit the source file below and then run `npm run sync-files`
 # Source: ui/raidboss/data/03-hw/trial/zurvan-ex.txt
diff --git a/util/csv_util.ts b/util/csv_util.ts
index 1340fd5f78..b4ea0e6e25 100644
--- a/util/csv_util.ts
+++ b/util/csv_util.ts
@@ -1,5 +1,3 @@
-#!/usr/bin/env ts-node-script
-
 import { parseString } from '@fast-csv/parse';
 import fetch from 'node-fetch';
 
diff --git a/util/sync_files.ts b/util/sync_files.ts
index c2700fb073..46ce9d97f8 100644
--- a/util/sync_files.ts
+++ b/util/sync_files.ts
@@ -10,7 +10,7 @@ const __filename = url.fileURLToPath(new URL('.', import.meta.url));
 const __dirname = path.basename(__filename);
 const root = path.join(__dirname, '../');
 
-const scriptName = 'ts-node util/sync_files.ts';
+const scriptName = 'npm run sync-files';
 
 export type ReplaceDict = { [key: string]: string };