diff --git a/src/llhttp/http.ts b/src/llhttp/http.ts
index 20c50e80..e3f29a8b 100644
--- a/src/llhttp/http.ts
+++ b/src/llhttp/http.ts
@@ -1,8 +1,10 @@
 import assert from 'assert';
 import { type LLParse, source } from 'llparse';
 
-import Match = source.node.Match;
-import Node = source.node.Node;
+const { Node } = source.node;
+
+type Match = source.node.Match;
+type Node = source.node.Node;
 
 import {
   type CharList,
@@ -171,8 +173,11 @@ export class HTTP {
   private readonly span: ISpanMap;
   private readonly callback: ICallbackMap;
   private readonly nodes = new Map<string, Match>();
+  private readonly llparse: LLParse;
+
+  constructor(llparse: LLParse) {
+    this.llparse = llparse;
 
-  constructor(private readonly llparse: LLParse) {
     const p = llparse;
 
     this.url = new URL(p);
diff --git a/src/llhttp/url.ts b/src/llhttp/url.ts
index 00c4864c..5257a2b7 100644
--- a/src/llhttp/url.ts
+++ b/src/llhttp/url.ts
@@ -1,7 +1,7 @@
-import { type LLParse, source } from 'llparse';
+import { type LLParse, type source } from 'llparse';
 
-import Match = source.node.Match;
-import Node = source.node.Node;
+type Node = source.node.Node;
+type Match = source.node.Match;
 
 import {
   ALPHA,
@@ -30,8 +30,10 @@ export class URL {
   private readonly spanTable: SpanTable = new Map();
   private readonly errorInvalid: Node;
   private readonly URL_CHAR: CharList;
+  private readonly llparse: LLParse;
 
-  constructor(private readonly llparse: LLParse, separateSpans = false) {
+  constructor(llparse: LLParse, separateSpans = false) {
+    this.llparse = llparse;
     const p = this.llparse;
 
     this.errorInvalid = p.error(ERROR.INVALID_URL, 'Invalid characters in url');
diff --git a/tsconfig.json b/tsconfig.json
index ec9c80b9..6647a101 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,6 +11,7 @@
     "declaration": true,
     "pretty": true,
     "sourceMap": true,
+    "erasableSyntaxOnly": true
   },
   "include": ["src/**/*.ts"],
 }
\ No newline at end of file
diff --git a/tsconfig.test.json b/tsconfig.test.json
index c9387330..1328441e 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -1,4 +1,8 @@
 {
   "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": true
+  },
   "include": ["bench/**/*.ts", "bin/**/*.ts", "src/**/*.ts", "test/**/*.ts", "eslint.config.mjs"],
 }