diff --git a/eslint.config.mjs b/eslint.config.mjs
index 30217a6..196deb9 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -9,13 +9,9 @@ import _import from 'eslint-plugin-import'
 import jest from 'eslint-plugin-jest'
 import prettier from 'eslint-plugin-prettier'
 import globals from 'globals'
-import path from 'node:path'
-import { fileURLToPath } from 'node:url'
 
-const __filename = fileURLToPath(import.meta.url)
-const __dirname = path.dirname(__filename)
 const compat = new FlatCompat({
-  baseDirectory: __dirname,
+  baseDirectory: import.meta.dirname,
   recommendedConfig: js.configs.recommended,
   allConfig: js.configs.all
 })
@@ -52,8 +48,18 @@ export default [
       sourceType: 'module',
 
       parserOptions: {
-        project: ['tsconfig.eslint.json'],
-        tsconfigRootDir: __dirname
+        projectService: {
+          allowDefaultProject: [
+            '__fixtures__/*.ts',
+            '__tests__/*.ts',
+            'eslint.config.mjs',
+            'jest.config.js',
+            'rollup.cleanup.config.ts',
+            'rollup.main.config.ts'
+          ],
+          maximumDefaultProjectFileMatchCount_THIS_WILL_SLOW_DOWN_LINTING: 32
+        },
+        tsconfigRootDir: import.meta.dirname
       }
     },
 
@@ -61,7 +67,7 @@ export default [
       'import/resolver': {
         typescript: {
           alwaysTryTypes: true,
-          project: 'tsconfig.eslint.json'
+          project: 'tsconfig.json'
         }
       }
     },
diff --git a/jest.config.js b/jest.config.js
index b68f59d..f21a085 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -20,7 +20,7 @@ export default {
     '^.+\\.ts$': [
       'ts-jest',
       {
-        tsconfig: 'tsconfig.eslint.json',
+        tsconfig: 'tsconfig.json',
         useESM: true
       }
     ]
diff --git a/tsconfig.base.json b/tsconfig.base.json
deleted file mode 100644
index cd82ad9..0000000
--- a/tsconfig.base.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/tsconfig",
-  "compilerOptions": {
-    "allowSyntheticDefaultImports": true,
-    "declaration": false,
-    "declarationMap": false,
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true,
-    "lib": ["ES2022"],
-    "module": "NodeNext",
-    "moduleResolution": "NodeNext",
-    "newLine": "lf",
-    "noImplicitAny": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": false,
-    "pretty": true,
-    "resolveJsonModule": true,
-    "sourceMap": false,
-    "strict": true,
-    "strictNullChecks": true,
-    "target": "ES2022"
-  }
-}
diff --git a/tsconfig.eslint.json b/tsconfig.eslint.json
deleted file mode 100644
index 41c0a4a..0000000
--- a/tsconfig.eslint.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/tsconfig",
-  "extends": "./tsconfig.base.json",
-  "compilerOptions": {
-    "allowJs": true,
-    "noEmit": true
-  },
-  "exclude": ["dist", "node_modules"],
-  "include": [
-    "__fixtures__",
-    "__tests__",
-    "src",
-    "eslint.config.mjs",
-    "jest.config.js",
-    "rollup.cleanup.config.ts",
-    "rollup.main.config.ts"
-  ]
-}
diff --git a/tsconfig.json b/tsconfig.json
index afd50ab..8191311 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,11 +1,25 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
-  "extends": "./tsconfig.base.json",
   "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "declaration": false,
+    "declarationMap": false,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,
+    "lib": ["ES2022"],
     "module": "NodeNext",
     "moduleResolution": "NodeNext",
-    "outDir": "./dist"
+    "newLine": "lf",
+    "noImplicitAny": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": false,
+    "outDir": "./dist",
+    "pretty": true,
+    "resolveJsonModule": true,
+    "strict": true,
+    "strictNullChecks": true,
+    "target": "ES2022"
   },
   "exclude": ["__fixtures__", "__tests__", "coverage", "dist", "node_modules"],
   "include": ["src"]