diff --git a/Cargo.lock b/Cargo.lock
index 4f477ceb4dec04..738bd78d73f7a2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2108,7 +2108,6 @@ dependencies = [
  "insta",
  "is-macro",
  "itertools",
- "log",
  "memchr",
  "num-bigint",
  "num-traits",
@@ -2217,7 +2216,7 @@ dependencies = [
 [[package]]
 name = "ruff_text_size"
 version = "0.0.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "schemars",
  "serde",
@@ -2319,7 +2318,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.2.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "is-macro",
  "num-bigint",
@@ -2330,7 +2329,7 @@ dependencies = [
 [[package]]
 name = "rustpython-format"
 version = "0.2.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "bitflags 2.3.3",
  "itertools",
@@ -2342,7 +2341,7 @@ dependencies = [
 [[package]]
 name = "rustpython-literal"
 version = "0.2.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "hexf-parse",
  "is-macro",
@@ -2354,20 +2353,18 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.2.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "anyhow",
  "is-macro",
  "itertools",
  "lalrpop-util",
- "log",
  "num-bigint",
  "num-traits",
- "phf",
- "phf_codegen",
  "rustc-hash",
  "rustpython-ast",
  "rustpython-parser-core",
+ "static_assertions",
  "tiny-keccak",
  "unic-emoji-char",
  "unic-ucd-ident",
@@ -2377,10 +2374,9 @@ dependencies = [
 [[package]]
 name = "rustpython-parser-core"
 version = "0.2.0"
-source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=4d03b9b5b212fc869e4cfda151414438186a7779#4d03b9b5b212fc869e4cfda151414438186a7779"
+source = "git+https://github.com/astral-sh/RustPython-Parser.git?rev=421639c0eabb3ff0358a8382cf098efe9f86ecda#421639c0eabb3ff0358a8382cf098efe9f86ecda"
 dependencies = [
  "is-macro",
- "memchr",
  "ruff_text_size",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 51a34651bc54ad..75eb8dca9e9f25 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,11 +52,17 @@ wsl = { version = "0.1.0" }
 # v1.0.1
 libcst = { git = "https://github.com/Instagram/LibCST.git", rev = "3cacca1a1029f05707e50703b49fe3dd860aa839", default-features = false }
 
-ruff_text_size = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779" }
-rustpython-ast = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779" , default-features = false, features = ["num-bigint"]}
-rustpython-format = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779", default-features = false, features = ["num-bigint"] }
-rustpython-literal = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779", default-features = false }
-rustpython-parser = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779" , default-features = false, features = ["full-lexer", "num-bigint"] }
+ruff_text_size = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
+rustpython-ast = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
+rustpython-format = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
+rustpython-literal = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
+rustpython-parser = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
+
+#ruff_text_size = { path = "../RustPython-parser/ruff_text_size" }
+#rustpython-ast = { path = "../RustPython-parser/ast" , default-features = false}
+#rustpython-format = { path = "../RustPython-parser/format", default-features = false }
+#rustpython-literal = { path = "../RustPython-parser/literal", default-features = false }
+#rustpython-parser = { path = "../RustPython-parser/parser", default-features = false}
 
 [profile.release]
 lto = "fat"
diff --git a/crates/ruff/resources/test/fixtures/jupyter/not_json.ipynb b/crates/ruff/resources/test/fixtures/jupyter/not_json.ipynb
index 45ed561e010b90..f9350b41c23283 100644
--- a/crates/ruff/resources/test/fixtures/jupyter/not_json.ipynb
+++ b/crates/ruff/resources/test/fixtures/jupyter/not_json.ipynb
@@ -1 +1 @@
-broken "§=($/=(")
+broken "§=($/=()
diff --git a/crates/ruff/src/jupyter/notebook.rs b/crates/ruff/src/jupyter/notebook.rs
index 76f39ce757a307..8e5e2a6b39bc70 100644
--- a/crates/ruff/src/jupyter/notebook.rs
+++ b/crates/ruff/src/jupyter/notebook.rs
@@ -12,6 +12,8 @@ use serde_json::error::Category;
 use ruff_diagnostics::Diagnostic;
 use ruff_python_trivia::{NewlineWithTrailingNewline, UniversalNewlineIterator};
 use ruff_text_size::{TextRange, TextSize};
+use rustpython_parser::lexer::lex;
+use rustpython_parser::Mode;
 
 use crate::autofix::source_map::{SourceMap, SourceMarker};
 use crate::jupyter::index::JupyterIndex;
@@ -158,10 +160,7 @@ impl Notebook {
                                 )
                             })?;
                             // Check if tokenizing was successful and the file is non-empty
-                            if (ruff_rustpython::tokenize(&contents))
-                                .last()
-                                .map_or(true, Result::is_err)
-                            {
+                            if lex(&contents, Mode::Module).any(|result| result.is_err()) {
                                 Diagnostic::new(
                                     SyntaxError {
                                         message: format!(
diff --git a/crates/ruff_python_ast/Cargo.toml b/crates/ruff_python_ast/Cargo.toml
index c5bba682a57ff8..110b198aeaa902 100644
--- a/crates/ruff_python_ast/Cargo.toml
+++ b/crates/ruff_python_ast/Cargo.toml
@@ -20,7 +20,6 @@ anyhow = { workspace = true }
 bitflags = { workspace = true }
 is-macro = { workspace = true }
 itertools = { workspace = true }
-log = { workspace = true }
 memchr = { workspace = true }
 num-bigint = { workspace = true }
 num-traits = { workspace = true }
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index fc763441187423..00132e4698672e 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -24,7 +24,7 @@ ruff_python_ast = { path = "../crates/ruff_python_ast" }
 ruff_python_formatter = { path = "../crates/ruff_python_formatter" }
 similar = { version = "2.2.1" }
 
-rustpython-parser = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "4d03b9b5b212fc869e4cfda151414438186a7779" , default-features = false, features = ["full-lexer", "num-bigint"] }
+rustpython-parser = { git = "https://github.com/astral-sh/RustPython-Parser.git", rev = "421639c0eabb3ff0358a8382cf098efe9f86ecda" }
 
 # Prevent this from interfering with workspaces
 [workspace]