diff --git a/Cargo.lock b/Cargo.lock
index 235183ac1..df9bfd9e7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -63,15 +63,6 @@ version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
 
-[[package]]
-name = "arrayvec"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
-dependencies = [
- "nodrop",
-]
-
 [[package]]
 name = "arrayvec"
 version = "0.5.1"
@@ -160,7 +151,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
 dependencies = [
  "arrayref",
- "arrayvec 0.5.1",
+ "arrayvec",
  "constant_time_eq",
 ]
 
@@ -762,26 +753,15 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "lexical"
-version = "4.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0afaeae1c07c575338ef6809875bfea8daa9ea8b2ee381ef1f93ba0c6e32f003"
-dependencies = [
- "cfg-if",
- "lexical-core",
- "rustc_version",
-]
-
 [[package]]
 name = "lexical-core"
-version = "0.6.2"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7043aa5c05dd34fb73b47acb8c3708eac428de4545ea3682ed2f11293ebd890"
+checksum = "db65c6da02e61f55dae90a0ae427b2a5f6b3e8db09f58d10efab23af92592616"
 dependencies = [
- "arrayvec 0.4.12",
+ "arrayvec",
+ "bitflags",
  "cfg-if",
- "rustc_version",
  "ryu",
  "static_assertions",
 ]
@@ -899,12 +879,6 @@ dependencies = [
  "void",
 ]
 
-[[package]]
-name = "nodrop"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
-
 [[package]]
 name = "num-bigint"
 version = "0.3.0"
@@ -1362,7 +1336,7 @@ version = "0.0.0"
 dependencies = [
  "cfg-if",
  "hexf-parse",
- "lexical",
+ "lexical-core",
  "num-bigint",
  "num-traits",
  "parking_lot",
@@ -1373,7 +1347,7 @@ dependencies = [
 name = "rustpython-compiler"
 version = "0.1.2"
 dependencies = [
- "arrayvec 0.5.1",
+ "arrayvec",
  "indexmap",
  "itertools 0.8.2",
  "log",
@@ -1451,7 +1425,7 @@ dependencies = [
  "indexmap",
  "is-macro",
  "itertools 0.8.2",
- "lexical",
+ "lexical-core",
  "libc",
  "libz-sys",
  "log",
@@ -1704,9 +1678,9 @@ dependencies = [
 
 [[package]]
 name = "static_assertions"
-version = "0.3.4"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f3eb36b47e512f8f1c9e3d10c2c1965bc992bd9cdb024fa581e2194501c83d3"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "statrs"
diff --git a/common/Cargo.toml b/common/Cargo.toml
index b8603397a..951660bfb 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -11,7 +11,7 @@ threading = ["parking_lot"]
 parking_lot = { version = "0.11.0", optional = true }
 num-traits = "0.2"
 num-bigint = "0.3"
-lexical = "4"
+lexical-core = "0.7"
 hexf-parse = "0.1.0"
 cfg-if = "0.1"
 
diff --git a/common/src/float_ops.rs b/common/src/float_ops.rs
index 34f2c4e6a..d7ebadee2 100644
--- a/common/src/float_ops.rs
+++ b/common/src/float_ops.rs
@@ -72,7 +72,7 @@ pub fn parse_str(literal: &str) -> Option<f64> {
         last_tok = Some(c);
     }
 
-    if let Ok(f) = lexical::parse(buf.as_str()) {
+    if let Ok(f) = lexical_core::parse(buf.as_bytes()) {
         Some(f)
     } else {
         None
diff --git a/vm/Cargo.toml b/vm/Cargo.toml
index ccd5bbdf0..05c21cd8e 100644
--- a/vm/Cargo.toml
+++ b/vm/Cargo.toml
@@ -52,7 +52,7 @@ statrs = "0.12.0"
 caseless = "0.2.1"
 chrono = { version = "0.4", features = ["wasmbind"] }
 once_cell = "1.3.1"
-lexical = "4"
+lexical-core = "0.7"
 itertools = "0.8"
 hex = "0.4.0"
 hexf-parse = "0.1.0"
diff --git a/vm/src/lib.rs b/vm/src/lib.rs
index 80724fd85..014515018 100644
--- a/vm/src/lib.rs
+++ b/vm/src/lib.rs
@@ -20,7 +20,6 @@ extern crate flamer;
 
 #[macro_use]
 extern crate bitflags;
-extern crate lexical;
 #[macro_use]
 extern crate log;
 #[macro_use]
diff --git a/vm/src/obj/objfloat.rs b/vm/src/obj/objfloat.rs
index dab3fe265..d3c162f5a 100644
--- a/vm/src/obj/objfloat.rs
+++ b/vm/src/obj/objfloat.rs
@@ -513,7 +513,7 @@ fn to_float(vm: &VirtualMachine, obj: &PyObjectRef) -> PyResult<f64> {
             vm.new_value_error(format!("could not convert string to float: '{}'", s))
         })?
     } else if let Some(bytes) = obj.payload_if_subclass::<PyBytes>(vm) {
-        lexical::parse(bytes.get_value()).map_err(|_| {
+        lexical_core::parse(bytes.get_value()).map_err(|_| {
             vm.new_value_error(format!(
                 "could not convert string to float: '{}'",
                 bytes.repr()