diff --git a/example/tsconfig.base.json b/example/tsconfig.base.json
new file mode 100644
index 0000000..28eb978
--- /dev/null
+++ b/example/tsconfig.base.json
@@ -0,0 +1,5 @@
+{
+  "compilerOptions": {
+    "useDefineForClassFields": false
+  }
+}
diff --git a/example/tsconfig.json b/example/tsconfig.json
index 28eb978..70aa5e9 100644
--- a/example/tsconfig.json
+++ b/example/tsconfig.json
@@ -1,5 +1,3 @@
 {
-  "compilerOptions": {
-    "useDefineForClassFields": false
-  }
+  "extends": ["./tsconfig.base.json"]
 }
diff --git a/package.json b/package.json
index 8004a8b..ee1d154 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "@rollup/pluginutils": "^5.0.4",
     "debug": "^4.3.4",
     "es-module-lexer": "^1.3.1",
-    "joycon": "^3.1.1"
+    "get-tsconfig": "^4.7.2"
   },
   "peerDependencies": {
     "esbuild": ">=0.18.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 086bb79..28d6cd0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -17,9 +17,9 @@ importers:
       es-module-lexer:
         specifier: ^1.3.1
         version: 1.3.1
-      joycon:
-        specifier: ^3.1.1
-        version: 3.1.1
+      get-tsconfig:
+        specifier: ^4.7.2
+        version: 4.7.2
     devDependencies:
       '@types/debug':
         specifier: ^4.1.8
@@ -1069,6 +1069,12 @@ packages:
     engines: {node: '>=10'}
     dev: true
 
+  /get-tsconfig@4.7.2:
+    resolution: {integrity: sha512-wuMsz4leaj5hbGgg4IvDU0bqJagpftG5l5cXIAvo8uZrqn0NJqwtfupTN00VnkQJPcIRrxYrm1Ue24btpCha2A==}
+    dependencies:
+      resolve-pkg-maps: 1.0.0
+    dev: false
+
   /glob-parent@5.1.2:
     resolution: {integrity: sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==}
     engines: {node: '>= 6'}
@@ -1197,6 +1203,7 @@ packages:
   /joycon@3.1.1:
     resolution: {integrity: sha512-34wB/Y7MW7bzjKRjUKTa46I2Z7eV62Rkhva+KkopW7Qvv/OSWBqvkSY7vusOPrNuZcUG3tApvdVgNB8POj3SPw==}
     engines: {node: '>=10'}
+    dev: true
 
   /js-tokens@4.0.0:
     resolution: {integrity: sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==}
@@ -1478,6 +1485,10 @@ packages:
     engines: {node: '>=8'}
     dev: true
 
+  /resolve-pkg-maps@1.0.0:
+    resolution: {integrity: sha512-seS2Tj26TBVOC2NIc2rOe2y2ZO7efxITtLZcGSOnHHNOQ7CkiUBfw0Iw2ck6xkIhPwLhKNLS8BO+hEpngQlqzw==}
+    dev: false
+
   /resolve@1.22.6:
     resolution: {integrity: sha512-njhxM7mV12JfufShqGy3Rz8j11RPdLy4xi15UurGJeoHLfJpVXKdh3ueuOqbYUcDZnffr6X739JBo5LzyahEsw==}
     hasBin: true
diff --git a/src/index.ts b/src/index.ts
index 0744fa0..42255fb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -152,7 +152,7 @@ export default ({
       const tsconfigRaw =
         tsconfig === false
           ? undefined
-          : await getTsconfig(dirname(id), tsconfig)
+          : getTsconfig(id, tsconfig || 'tsconfig.json')
 
       const result = await transform(code, {
         loader,
diff --git a/src/tsconfig.ts b/src/tsconfig.ts
index 6c36045..888430b 100644
--- a/src/tsconfig.ts
+++ b/src/tsconfig.ts
@@ -1,18 +1,10 @@
-import { readFile } from 'fs/promises'
-import JoyCon from 'joycon'
+import { getTsconfig as findTsconfig, TsConfigJsonResolved } from 'get-tsconfig'
 
-const joycon = new JoyCon()
+const cache = new Map<string, unknown>()
 
-joycon.addLoader({
-  test: /\.json$/,
-  load: (file) => readFile(file, 'utf8'),
-})
-
-export const getTsconfig = async (
-  cwd: string,
-  tsconfig?: string,
-): Promise<string> => {
-  // This call is cached
-  const { data } = await joycon.load([tsconfig || 'tsconfig.json'], cwd)
-  return data
+export function getTsconfig(
+  searchPath: string,
+  configName: string,
+): TsConfigJsonResolved | undefined {
+  return findTsconfig(searchPath, configName, cache)?.config
 }