diff --git a/.gitignore b/.gitignore
index c5c4338e5..9641d2574 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ cypress/snapshots/
 
 # eslint --cache file
 .eslintcache
+.tsbuildinfo
+tsconfig.tsbuildinfo
diff --git a/package.json b/package.json
index bee4483b7..46daf9e16 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "git graph"
   ],
   "scripts": {
-    "build:fast": "node .esbuild/esbuild.cjs",
+    "build:fast": "rm -rf dist; node .esbuild/esbuild.cjs; tsc --emitDeclarationOnly",
     "build:dev": "webpack --mode development --progress --color",
     "build:prod": "webpack --mode production --progress --color",
     "build": "concurrently \"yarn build:dev\" \"yarn build:prod\"",
diff --git a/src/diagrams/sequence/sequenceRenderer.js b/src/diagrams/sequence/sequenceRenderer.ts
similarity index 99%
rename from src/diagrams/sequence/sequenceRenderer.js
rename to src/diagrams/sequence/sequenceRenderer.ts
index c3ea1bcfd..a6ceb1706 100644
--- a/src/diagrams/sequence/sequenceRenderer.js
+++ b/src/diagrams/sequence/sequenceRenderer.ts
@@ -1,3 +1,4 @@
+// @ts-nocheck
 import { select, selectAll } from 'd3';
 import svgDraw, { drawText, fixLifeLineHeights } from './svgDraw';
 import { log } from '../../logger';
diff --git a/src/diagrams/user-journey/journeyRenderer.js b/src/diagrams/user-journey/journeyRenderer.ts
similarity index 99%
rename from src/diagrams/user-journey/journeyRenderer.js
rename to src/diagrams/user-journey/journeyRenderer.ts
index 0e3f94f34..dad68f2f3 100644
--- a/src/diagrams/user-journey/journeyRenderer.js
+++ b/src/diagrams/user-journey/journeyRenderer.ts
@@ -1,3 +1,4 @@
+// @ts-nocheck
 import { select } from 'd3';
 import svgDraw from './svgDraw';
 import { getConfig } from '../../config';