diff --git a/Cargo.lock b/Cargo.lock
index 969b7b6..0f07b85 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -252,9 +252,9 @@ checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
 [[package]]
 name = "els"
-version = "0.1.25"
+version = "0.1.26-nightly.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dcd32d4edf0238db4d013f535f48c18140576e2ec442b2450f76af4d0390c19"
+checksum = "9cf50f787a8376384af8e7b074c489329669eeb1264f15f1a7f136102a003f2f"
 dependencies = [
  "erg_common",
  "erg_compiler",
@@ -274,9 +274,9 @@ dependencies = [
 
 [[package]]
 name = "erg_common"
-version = "0.6.13"
+version = "0.6.14-nightly.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4b35305d26ff0fe55ec69aba95d85829371254698e2e5c8394beee1e1ee582c"
+checksum = "c0d10554accd6de5e3f41e3db5931348320c89b9745a82635887f850dd77aadb"
 dependencies = [
  "backtrace-on-stack-overflow",
  "hermit-abi",
@@ -286,9 +286,9 @@ dependencies = [
 
 [[package]]
 name = "erg_compiler"
-version = "0.6.13"
+version = "0.6.14-nightly.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57f5eaab1acfa0a27815bbc284bbb16189aae4d45757308986f836aa23e435c5"
+checksum = "3570aa70c9f488516c6286280ae4d3343aed382b6c7881b784195af64350aa50"
 dependencies = [
  "erg_common",
  "erg_parser",
@@ -296,9 +296,9 @@ dependencies = [
 
 [[package]]
 name = "erg_parser"
-version = "0.6.13"
+version = "0.6.14-nightly.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a56d54cbba3a394d9f0b16f85f835b040b454c4ba6b6530a67c3caff522c29d4"
+checksum = "bfd44c03719e8051c7997263298e2b792da6138f818646d0eeae359f92bf0c60"
 dependencies = [
  "erg_common",
  "unicode-xid 0.2.4",
diff --git a/Cargo.toml b/Cargo.toml
index f66dcca..eab392e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,9 +22,9 @@ edition = "2021"
 repository = "https://github.com/mtshiba/pylyzer"
 
 [workspace.dependencies]
-erg_common = { version = "0.6.13", features = ["py_compat", "els"] }
-erg_compiler = { version = "0.6.13", features = ["py_compat", "els"] }
-els = { version = "0.1.25", features = ["py_compat"] }
+erg_common = { version = "0.6.14-nightly.0", features = ["py_compat", "els"] }
+erg_compiler = { version = "0.6.14-nightly.0", features = ["py_compat", "els"] }
+els = { version = "0.1.26-nightly.0", features = ["py_compat"] }
 rustpython-parser = "0.1.2"
 # erg_compiler = { git = "https://github.com/erg-lang/erg", branch = "main", features = ["py_compat", "els"] }
 # erg_common = { git = "https://github.com/erg-lang/erg", branch = "main", features = ["py_compat", "els"] }
diff --git a/src/analyze.rs b/src/analyze.rs
index 597fcfe..5f21739 100644
--- a/src/analyze.rs
+++ b/src/analyze.rs
@@ -7,7 +7,9 @@ use erg_common::Str;
 use erg_compiler::artifact::{BuildRunnable, Buildable, CompleteArtifact, IncompleteArtifact};
 use erg_compiler::context::register::CheckStatus;
 use erg_compiler::context::ModuleContext;
-use erg_compiler::erg_parser::ast::AST;
+use erg_compiler::erg_parser::ast::{AST, Module};
+use erg_compiler::erg_parser::error::ParseErrors;
+use erg_compiler::erg_parser::parse::Parsable;
 use erg_compiler::error::{CompileError, CompileErrors};
 use erg_compiler::lower::ASTLowerer;
 use erg_compiler::module::SharedCompilerResource;
@@ -16,6 +18,28 @@ use rustpython_parser::parser;
 
 use crate::handle_err;
 
+pub struct SimplePythonParser {}
+
+impl Parsable for SimplePythonParser {
+    fn parse(code: String) -> Result<Module, ParseErrors> {
+        let py_program = parser::parse_program(&code).map_err(|_err| {
+            ParseErrors::empty()
+        })?;
+        let shadowing = if cfg!(feature = "debug") {
+            ShadowingMode::Visible
+        } else {
+            ShadowingMode::Invisible
+        };
+        let converter = py2erg::ASTConverter::new(ErgConfig::default(), shadowing);
+        let IncompleteArtifact{ object: Some(erg_module), errors, .. } = converter.convert_program(py_program) else { unreachable!() };
+        if errors.is_empty() {
+            Ok(erg_module)
+        } else {
+            Err(ParseErrors::empty())
+        }
+    }
+}
+
 #[derive(Debug, Default)]
 pub struct PythonAnalyzer {
     pub cfg: ErgConfig,
diff --git a/src/main.rs b/src/main.rs
index 65b1d64..cf4bffa 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,7 @@ mod analyze;
 mod config;
 mod handle_err;
 
-use analyze::PythonAnalyzer;
+use analyze::{PythonAnalyzer, SimplePythonParser};
 use els::Server;
 use erg_common::config::ErgMode;
 use erg_common::spawn::exec_new_thread;
@@ -10,7 +10,7 @@ use erg_common::spawn::exec_new_thread;
 fn run() {
     let cfg = config::parse_args();
     if cfg.mode == ErgMode::LanguageServer {
-        let mut lang_server = Server::<PythonAnalyzer>::new(cfg);
+        let mut lang_server = Server::<PythonAnalyzer, SimplePythonParser>::new(cfg);
         lang_server.run().unwrap_or_else(|_| {
             std::process::exit(1);
         });