diff --git a/Cargo.lock b/Cargo.lock
index efe6c395c..f3cce34d1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -874,11 +874,10 @@ dependencies = [
 
 [[package]]
 name = "num-complex"
-version = "0.2.4"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6b19411a9719e753aff12e5187b74d60d3dc449ec3f4dc21e3989c3f554bc95"
+checksum = "b05ad05bd8977050b171b3f6b48175fea6e0565b7981059b486075e1026a9fb5"
 dependencies = [
- "autocfg",
  "num-traits",
  "serde",
 ]
@@ -1320,6 +1319,7 @@ dependencies = [
  "hexf-parse",
  "lexical-core",
  "num-bigint",
+ "num-complex",
  "num-traits",
  "parking_lot",
  "rand",
diff --git a/bytecode/Cargo.toml b/bytecode/Cargo.toml
index 95206a3bf..2188e8d18 100644
--- a/bytecode/Cargo.toml
+++ b/bytecode/Cargo.toml
@@ -13,6 +13,6 @@ bincode =  "1.1"
 bitflags = "1.1"
 lz4-compression = "0.7"
 num-bigint = { version = "0.3", features = ["serde"] }
-num-complex = { version = "0.2", features = ["serde"] }
+num-complex = { version = "0.3", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 itertools = "0.9"
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 951660bfb..986697cc0 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -10,6 +10,7 @@ threading = ["parking_lot"]
 [dependencies]
 parking_lot = { version = "0.11.0", optional = true }
 num-traits = "0.2"
+num-complex = "0.3"
 num-bigint = "0.3"
 lexical-core = "0.7"
 hexf-parse = "0.1.0"
diff --git a/common/src/hash.rs b/common/src/hash.rs
index 58c554f43..2e683a151 100644
--- a/common/src/hash.rs
+++ b/common/src/hash.rs
@@ -1,7 +1,9 @@
 use num_bigint::BigInt;
+use num_complex::Complex64;
 use num_traits::ToPrimitive;
 use std::collections::hash_map::DefaultHasher;
 use std::hash::{Hash, Hasher};
+use std::num::Wrapping;
 
 pub type PyHash = i64;
 pub type PyUHash = u64;
@@ -79,6 +81,13 @@ pub fn hash_float(value: f64) -> PyHash {
     x as PyHash * value.signum() as PyHash
 }
 
+pub fn hash_complex(value: &Complex64) -> PyHash {
+    let re_hash = hash_float(value.re);
+    let im_hash = hash_float(value.im);
+    let ret = Wrapping(re_hash) + Wrapping(im_hash) * Wrapping(IMAG);
+    ret.0
+}
+
 pub fn hash_iter<'a, T: 'a, I, F, E>(iter: I, hashf: F) -> Result<PyHash, E>
 where
     I: IntoIterator<Item = &'a T>,
diff --git a/compiler/Cargo.toml b/compiler/Cargo.toml
index 6846c4386..9c73674ee 100644
--- a/compiler/Cargo.toml
+++ b/compiler/Cargo.toml
@@ -12,6 +12,6 @@ indexmap = "1.0"
 itertools = "0.9"
 rustpython-bytecode = { path = "../bytecode", version = "0.1.1" }
 rustpython-parser = { path = "../parser", version = "0.1.1" }
-num-complex = { version = "0.2", features = ["serde"] }
+num-complex = { version = "0.3", features = ["serde"] }
 log = "0.4"
 arrayvec = "0.5"
diff --git a/vm/Cargo.toml b/vm/Cargo.toml
index f7a9ac5a8..19e2da12e 100644
--- a/vm/Cargo.toml
+++ b/vm/Cargo.toml
@@ -28,7 +28,7 @@ sha3 = "0.8"
 blake2 = "0.8"
 volatile = "0.2"
 
-num-complex = { version = "0.2.2", features = ["serde"] }
+num-complex = { version = "0.3", features = ["serde"] }
 num-bigint = { version = "0.3", features = ["serde"] }
 num-traits = "0.2.8"
 num-integer = "0.1.41"
diff --git a/vm/src/obj/objcomplex.rs b/vm/src/obj/objcomplex.rs
index 7da74eb42..ea4327d46 100644
--- a/vm/src/obj/objcomplex.rs
+++ b/vm/src/obj/objcomplex.rs
@@ -1,6 +1,5 @@
 use num_complex::Complex64;
 use num_traits::Zero;
-use std::num::Wrapping;
 use std::str::FromStr;
 
 use super::objfloat::{self, IntoPyFloat, PyFloat};
@@ -9,8 +8,8 @@ use super::objstr::PyString;
 use super::objtype::PyClassRef;
 use crate::function::OptionalArg;
 use crate::pyobject::{
-    BorrowValue, IntoPyObject, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue,
-    TypeProtocol,
+    BorrowValue, IntoPyObject, Never, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult,
+    PyValue, TypeProtocol,
 };
 use crate::vm::VirtualMachine;
 use rustpython_common::hash;
@@ -89,15 +88,11 @@ impl PyComplex {
     }
 
     #[pymethod(name = "__add__")]
+    #[pymethod(name = "__radd__")]
     fn add(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
         self.op(other, |a, b| a + b, vm)
     }
 
-    #[pymethod(name = "__radd__")]
-    fn radd(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        self.add(other, vm)
-    }
-
     #[pymethod(name = "__sub__")]
     fn sub(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
         self.op(other, |a, b| a - b, vm)
@@ -129,25 +124,21 @@ impl PyComplex {
     }
 
     #[pymethod(name = "__float__")]
-    fn float(&self, vm: &VirtualMachine) -> PyResult<()> {
+    fn float(&self, vm: &VirtualMachine) -> PyResult<Never> {
         Err(vm.new_type_error(String::from("Can't convert complex to float")))
     }
 
     #[pymethod(name = "__int__")]
-    fn int(&self, vm: &VirtualMachine) -> PyResult<()> {
+    fn int(&self, vm: &VirtualMachine) -> PyResult<Never> {
         Err(vm.new_type_error(String::from("Can't convert complex to int")))
     }
 
     #[pymethod(name = "__mul__")]
+    #[pymethod(name = "__rmul__")]
     fn mul(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
         self.op(other, |a, b| a * b, vm)
     }
 
-    #[pymethod(name = "__rmul__")]
-    fn rmul(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        self.mul(other, vm)
-    }
-
     #[pymethod(name = "__truediv__")]
     fn truediv(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
         self.op(other, |a, b| a / b, vm)
@@ -159,33 +150,21 @@ impl PyComplex {
     }
 
     #[pymethod(name = "__mod__")]
-    fn mod_(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
+    #[pymethod(name = "__rmod__")]
+    fn mod_(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult<Never> {
         Err(vm.new_type_error("can't mod complex numbers.".to_owned()))
     }
 
-    #[pymethod(name = "__rmod__")]
-    fn rmod(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        self.mod_(other, vm)
-    }
-
     #[pymethod(name = "__floordiv__")]
-    fn floordiv(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
+    #[pymethod(name = "__rfloordiv__")]
+    fn floordiv(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult<Never> {
         Err(vm.new_type_error("can't take floor of complex number.".to_owned()))
     }
 
-    #[pymethod(name = "__rfloordiv__")]
-    fn rfloordiv(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        self.floordiv(other, vm)
-    }
-
     #[pymethod(name = "__divmod__")]
-    fn divmod(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        Err(vm.new_type_error("can't take floor or mod of complex number.".to_owned()))
-    }
-
     #[pymethod(name = "__rdivmod__")]
-    fn rdivmod(&self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
-        self.divmod(other, vm)
+    fn divmod(&self, _other: PyObjectRef, vm: &VirtualMachine) -> PyResult<Never> {
+        Err(vm.new_type_error("can't take floor or mod of complex number.".to_owned()))
     }
 
     #[pymethod(name = "__pos__")]
@@ -247,7 +226,7 @@ impl PyComplex {
                     }
                     let value = Complex64::from_str(s.borrow_value())
                         .map_err(|err| vm.new_value_error(err.to_string()))?;
-                    return PyComplex { value }.into_ref_with_type(vm, cls);
+                    return Self::from(value).into_ref_with_type(vm, cls);
                 }
                 obj => {
                     return Err(vm.new_type_error(format!(
@@ -264,15 +243,12 @@ impl PyComplex {
         };
 
         let value = Complex64::new(real, imag);
-        PyComplex { value }.into_ref_with_type(vm, cls)
+        Self::from(value).into_ref_with_type(vm, cls)
     }
 
     #[pymethod(name = "__hash__")]
     fn hash(&self) -> hash::PyHash {
-        let re_hash = hash::hash_float(self.value.re);
-        let im_hash = hash::hash_float(self.value.im);
-        let ret = Wrapping(re_hash) + Wrapping(im_hash) * Wrapping(hash::IMAG);
-        ret.0
+        hash::hash_complex(&self.value)
     }
 
     #[pymethod(name = "__getnewargs__")]
diff --git a/vm/src/pyobject.rs b/vm/src/pyobject.rs
index 41d167e92..9ed0eae4e 100644
--- a/vm/src/pyobject.rs
+++ b/vm/src/pyobject.rs
@@ -834,7 +834,7 @@ pub trait IdProtocol {
     }
 }
 
-type Never = std::convert::Infallible;
+pub type Never = std::convert::Infallible;
 
 impl PyValue for Never {
     fn class(_vm: &VirtualMachine) -> PyClassRef {