diff --git a/Cargo.lock b/Cargo.lock
index 9c58ea34..c07664b2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -19,9 +19,9 @@ checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
 
 [[package]]
 name = "ast-grep-config"
-version = "0.15.0"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8083f0edc3b8fe42fa1dbf666a0ea084ee0a72e8a4354ec1251440267883f18"
+checksum = "03af9c066a8da893b7befc6c31bd33f1454b7615f508b459c4697a32d1c8f095"
 dependencies = [
  "anyhow",
  "ast-grep-core",
@@ -36,9 +36,9 @@ dependencies = [
 
 [[package]]
 name = "ast-grep-core"
-version = "0.15.0"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0353298422bffe28e42132ca9bf0ec90bb8236ab856290ead47f0a78504e9572"
+checksum = "0a30b9206096187d7eed7cd6840a7f3b62e02f3e7b643c05a425afb80675363d"
 dependencies = [
  "bit-set",
  "regex",
@@ -48,9 +48,9 @@ dependencies = [
 
 [[package]]
 name = "ast-grep-language"
-version = "0.15.0"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7bcdbe508ba144f61d5e97080a3fbe309b24bfd2b087e6a002aa6c76756e744c"
+checksum = "579e0ae5267b160000d5626df33879ee02ec4663a08142406f3595e76cafa965"
 dependencies = [
  "ast-grep-core",
  "ignore",
diff --git a/Cargo.toml b/Cargo.toml
index ddfa0c38..d9d9d76c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,9 +28,9 @@ console_error_panic_hook = { version = "0.1.7", optional = true }
 
 once_cell = "1.19.0"
 wee_alloc = { version = "0.4.5" }
-ast-grep-core = { version = "0.15.0" }
-ast-grep-config = { version = "0.15.0" }
-ast-grep-language = { version = "0.15.0", default-features = false }
+ast-grep-core = { version = "0.15.1" }
+ast-grep-config = { version = "0.15.1" }
+ast-grep-language = { version = "0.15.1", default-features = false }
 web-tree-sitter-sg = "1.3.4"
 tree-sitter = { version = "0.9.2", package = "tree-sitter-facade-sg" }
 serde-wasm-bindgen = "0.6"
diff --git a/src/lib.rs b/src/lib.rs
index 002826b0..c0ab3685 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -60,30 +60,31 @@ pub fn fix_errors(src: String, configs: Vec<JsValue>) -> Result<String, JsError>
     rules.push(finder);
   }
   let combined = CombinedScan::new(rules.iter().collect());
-  let root = lang.ast_grep(&src);
+  let doc = WasmDoc::new(src.clone(), lang);
+  let root = AstGrep::doc(doc);
   let sets = combined.find(&root);
   let diffs = combined.diffs(&root, sets);
   if diffs.is_empty() {
     return Ok(src);
   }
   let mut start = 0;
-  let src = src.as_bytes();
-  let mut new_content = Vec::new();
+  let src: Vec<_> = src.chars().collect();
+  let mut new_content = Vec::<char>::new();
   for (nm, idx) in diffs {
     let range = nm.range();
     if start > range.start {
       continue;
     }
     let rule = combined.get_rule(idx);
-    let fixer = rule.fixer.as_ref().unwrap();
-    let edit = nm.make_edit(&rule.matcher, fixer);
+    let fixer = rule.get_fixer()?.expect("rule returned by diff must have fixer");
+    let edit = nm.make_edit(&rule.matcher, &fixer);
     new_content.extend(&src[start..edit.position]);
     new_content.extend(&edit.inserted_text);
     start = edit.position + edit.deleted_length;
   }
   // add trailing statements
   new_content.extend(&src[start..]);
-  Ok(String::from_utf8(new_content)?)
+  Ok(new_content.into_iter().collect())
 }
 
 fn convert_to_debug_node(n: Node) -> DumpNode {