diff --git a/.prettierrc b/.prettierrc
deleted file mode 100644
index d3353e965..000000000
--- a/.prettierrc
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "proseWrap": "always",
-  "printWidth": 120
-}
diff --git a/jest.config.js b/jest.config.js
index 761e0e52c..8ae2b468f 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,7 +1,7 @@
 module.exports = {
   globals: {
     "ts-jest": {
-      tsconfig: "tsconfig.jest.json",
+      tsconfig: "tsconfig.esm.json",
     },
   },
   preset: "ts-jest",
diff --git a/package.json b/package.json
index ef2cf9ba5..696d42599 100644
--- a/package.json
+++ b/package.json
@@ -43,14 +43,14 @@
   },
   "homepage": "https://github.com/drwpow/openapi-typescript#readme",
   "scripts": {
-    "build": "rm -rf dist && tsc --build tsconfig.json && tsc --build tsconfig.cjs.json",
+    "build": "rm -rf dist && tsc --project tsconfig.esm.json && tsc --project tsconfig.cjs.json",
     "format": "npm run prettier -w .",
     "lint": "eslint .",
     "prepare": "npm run build",
     "pregenerate": "npm run build",
     "test": "npm run build && jest --no-cache",
     "test:coverage": "npm run build && jest --no-cache --coverage && codecov",
-    "typecheck": "tsc --noEmit",
+    "typecheck": "tsc --noEmit --project tsconfig.esm.json",
     "version": "npm run build"
   },
   "dependencies": {
diff --git a/prettier.config.js b/prettier.config.js
new file mode 100644
index 000000000..794d85c24
--- /dev/null
+++ b/prettier.config.js
@@ -0,0 +1,4 @@
+module.exports = {
+  printWidth: 120,
+  proseWrap: "always",
+};
diff --git a/tsconfig.base.json b/tsconfig.base.json
new file mode 100644
index 000000000..ac82ec025
--- /dev/null
+++ b/tsconfig.base.json
@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "baseUrl": "./src",
+    "declaration": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["ES2018"],
+    "moduleResolution": "Node",
+    "noImplicitReturns": true,
+    "removeComments": true,
+    "sourceMap": true,
+    "strict": true,
+    "target": "ES2018",
+    "useDefineForClassFields": true
+  },
+  "exclude": ["examples/*", "tests/**/*"],
+  "include": ["src"]
+}
diff --git a/tsconfig.cjs.json b/tsconfig.cjs.json
index cce4819eb..6b873a4f2 100644
--- a/tsconfig.cjs.json
+++ b/tsconfig.cjs.json
@@ -1,21 +1,7 @@
 {
   "compilerOptions": {
-    "baseUrl": "./src",
-    "declaration": true,
-    "esModuleInterop": true,
-    "lib": ["ESNext"],
     "module": "CommonJS",
-    "moduleResolution": "node",
-    "noImplicitAny": true,
-    "noImplicitReturns": true,
-    "noUnusedLocals": true,
-    "outDir": "./dist/cjs",
-    "removeComments": true,
-    "skipLibCheck": true,
-    "sourceMap": true,
-    "strict": true,
-    "target": "ES2018"
+    "outDir": "./dist/cjs"
   },
-  "include": ["src"],
-  "exclude": ["examples/*", "tests/**/*"]
+  "extends": "./tsconfig.base.json"
 }
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
new file mode 100644
index 000000000..2086f3280
--- /dev/null
+++ b/tsconfig.esm.json
@@ -0,0 +1,7 @@
+{
+  "compilerOptions": {
+    "module": "ES2020",
+    "outDir": "./dist/esm"
+  },
+  "extends": "./tsconfig.base.json"
+}
diff --git a/tsconfig.jest.json b/tsconfig.jest.json
deleted file mode 100644
index e31ca0d7e..000000000
--- a/tsconfig.jest.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "compilerOptions": {
-    "baseUrl": "./src",
-    "declaration": true,
-    "esModuleInterop": true,
-    "lib": ["ESNext"],
-    "module": "ESNext",
-    "moduleResolution": "node",
-    "noImplicitAny": true,
-    "noImplicitReturns": true,
-    "noUnusedLocals": true,
-    "outDir": "./dist/esm",
-    "removeComments": true,
-    "skipLibCheck": true,
-    "sourceMap": true,
-    "strict": true,
-    "target": "ES2018"
-  },
-  "include": ["src"],
-  "exclude": ["examples/*", "tests/**/*"]
-}
diff --git a/tsconfig.json b/tsconfig.json
deleted file mode 100644
index f0f1cd66f..000000000
--- a/tsconfig.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "compilerOptions": {
-    "baseUrl": "./src",
-    "declaration": true,
-    "esModuleInterop": true,
-    "lib": ["ESNext"],
-    "module": "ESNext",
-    "moduleResolution": "node",
-    "noImplicitAny": true,
-    "noImplicitReturns": true,
-    "noUnusedLocals": true,
-    "outDir": "./dist/esm",
-    "removeComments": true,
-    "skipLibCheck": true,
-    "sourceMap": true,
-    "strict": true,
-    "target": "ES2020"
-  },
-  "include": ["src"],
-  "exclude": ["examples/*", "tests/**/*"]
-}