diff --git a/Cargo.lock b/Cargo.lock
index 5b604ad3d..2f7159c12 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -279,12 +279,13 @@ checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
 [[package]]
 name = "cpython"
-version = "0.2.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b489034e723e7f5109fecd19b719e664f89ef925be785885252469e9822fa940"
+checksum = "c2efcf01fcd3a7322d82970f45bc02cc089282fe9dea6f6efb45b173f10eacec"
 dependencies = [
  "libc",
  "num-traits",
+ "paste",
  "python3-sys",
 ]
 
@@ -1121,9 +1122,9 @@ dependencies = [
 
 [[package]]
 name = "python3-sys"
-version = "0.2.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61e4aac43f833fd637e429506cb2ac9d7df672c4b68f2eaaa163649b7fdc0444"
+checksum = "968ddca15e0fa74da3207aeb7b9fbbe94864dd13a17eaa95f75b5b836abf3007"
 dependencies = [
  "libc",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index d99b23c33..99e67c50e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,9 +41,8 @@ flamescope = { version = "0.1", optional = true }
 [target.'cfg(not(target_os = "wasi"))'.dependencies]
 rustyline = "6.0"
 
-
-[dev-dependencies.cpython]
-version = "0.2"
+[dev-dependencies]
+cpython = "0.5.0"
 
 [[bin]]
 name = "rustpython"
diff --git a/benchmarks/bench.rs b/benchmarks/bench.rs
index 7f27f0a1e..9ffeffcba 100644
--- a/benchmarks/bench.rs
+++ b/benchmarks/bench.rs
@@ -1,19 +1,20 @@
 #![feature(test)]
 
-extern crate cpython;
-extern crate rustpython_parser;
-extern crate rustpython_vm;
 extern crate test;
 
 use rustpython_compiler::compile;
 use rustpython_vm::pyobject::PyResult;
 use rustpython_vm::VirtualMachine;
 
+const MINIDOM: &str = include_str!("./benchmarks/minidom.py");
+const NBODY: &str = include_str!("./benchmarks/nbody.py");
+const MANDELBROT: &str = include_str!("./benchmarks/mandelbrot.py");
+
 #[bench]
 fn bench_tokenization(b: &mut test::Bencher) {
     use rustpython_parser::lexer::{make_tokenizer, Tok};
 
-    let source = include_str!("./benchmarks/minidom.py");
+    let source = MINIDOM;
 
     b.bytes = source.len() as _;
     b.iter(|| {
@@ -28,7 +29,7 @@ fn bench_tokenization(b: &mut test::Bencher) {
 fn bench_rustpy_parse_to_ast(b: &mut test::Bencher) {
     use rustpython_parser::parser::parse_program;
 
-    let source = include_str!("./benchmarks/minidom.py");
+    let source = MINIDOM;
 
     b.bytes = source.len() as _;
     b.iter(|| parse_program(source).unwrap())
@@ -36,7 +37,7 @@ fn bench_rustpy_parse_to_ast(b: &mut test::Bencher) {
 
 #[bench]
 fn bench_cpython_parse_to_ast(b: &mut test::Bencher) {
-    let source = include_str!("./benchmarks/minidom.py");
+    let source = MINIDOM;
 
     let gil = cpython::Python::acquire_gil();
     let python = gil.python();
@@ -55,10 +56,7 @@ fn bench_cpython_parse_to_ast(b: &mut test::Bencher) {
     })
 }
 
-#[bench]
-fn bench_cpython_nbody(b: &mut test::Bencher) {
-    let source = include_str!("./benchmarks/nbody.py");
-
+fn bench_cpython(b: &mut test::Bencher, source: &str) {
     let gil = cpython::Python::acquire_gil();
     let python = gil.python();
 
@@ -71,54 +69,37 @@ fn bench_cpython_nbody(b: &mut test::Bencher) {
     })
 }
 
+#[bench]
+fn bench_cpython_nbody(b: &mut test::Bencher) {
+    bench_cpython(b, NBODY)
+}
+
 #[bench]
 fn bench_cpython_mandelbrot(b: &mut test::Bencher) {
-    let source = include_str!("./benchmarks/mandelbrot.py");
+    bench_cpython(b, MANDELBROT)
+}
 
-    let gil = cpython::Python::acquire_gil();
-    let python = gil.python();
+fn bench_rustpy(b: &mut test::Bencher, name: &str, source: &str) {
+    // NOTE: Take long time.
+    let vm = VirtualMachine::default();
 
-    let globals = None;
-    let locals = None;
+    let code = vm
+        .compile(source, compile::Mode::Exec, name.to_owned())
+        .unwrap();
 
     b.iter(|| {
-        let res: cpython::PyResult<()> = python.run(source, globals, locals);
-        assert!(res.is_ok());
+        let scope = vm.new_scope_with_builtins();
+        let res: PyResult = vm.run_code_obj(code.clone(), scope);
+        vm.unwrap_pyresult(res);
     })
 }
 
 #[bench]
 fn bench_rustpy_nbody(b: &mut test::Bencher) {
-    // NOTE: Take long time.
-    let source = include_str!("./benchmarks/nbody.py");
-
-    let vm = VirtualMachine::default();
-
-    let code = vm
-        .compile(source, compile::Mode::Exec, "<stdin>".to_owned())
-        .unwrap();
-
-    b.iter(|| {
-        let scope = vm.new_scope_with_builtins();
-        let res: PyResult = vm.run_code_obj(code.clone(), scope);
-        vm.unwrap_pyresult(res);
-    })
+    bench_rustpy(b, "nbody.py", NBODY)
 }
 
 #[bench]
 fn bench_rustpy_mandelbrot(b: &mut test::Bencher) {
-    // NOTE: Take long time.
-    let source = include_str!("./benchmarks/mandelbrot.py");
-
-    let vm = VirtualMachine::default();
-
-    let code = vm
-        .compile(source, compile::Mode::Exec, "<stdin>".to_owned())
-        .unwrap();
-
-    b.iter(|| {
-        let scope = vm.new_scope_with_builtins();
-        let res: PyResult = vm.run_code_obj(code.clone(), scope);
-        vm.unwrap_pyresult(res);
-    })
+    bench_rustpy(b, "mandelbrot.py", MANDELBROT)
 }