diff --git a/src/_bcrypt/Cargo.lock b/src/_bcrypt/Cargo.lock
index 30d2b46e..87cf5bb7 100644
--- a/src/_bcrypt/Cargo.lock
+++ b/src/_bcrypt/Cargo.lock
@@ -8,12 +8,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
-[[package]]
-name = "base64"
-version = "0.13.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
-
 [[package]]
 name = "base64"
 version = "0.21.2"
@@ -26,7 +20,7 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28d1c9c15093eb224f0baa400f38fcd713fc1391a6f1c389d886beef146d60a3"
 dependencies = [
- "base64 0.21.2",
+ "base64",
  "blowfish",
  "getrandom",
  "subtle",
@@ -48,7 +42,7 @@ dependencies = [
 name = "bcrypt-rust"
 version = "0.1.0"
 dependencies = [
- "base64 0.13.1",
+ "base64",
  "bcrypt",
  "bcrypt-pbkdf",
  "pyo3",
diff --git a/src/_bcrypt/Cargo.toml b/src/_bcrypt/Cargo.toml
index bcf078a7..e4a32505 100644
--- a/src/_bcrypt/Cargo.toml
+++ b/src/_bcrypt/Cargo.toml
@@ -9,7 +9,7 @@ publish = false
 pyo3 = { version = "0.19.1" }
 bcrypt = "0.15"
 bcrypt-pbkdf = "0.10.0"
-base64 = "0.13.1"
+base64 = "0.21.1"
 
 [features]
 extension-module = ["pyo3/extension-module"]
diff --git a/src/_bcrypt/src/lib.rs b/src/_bcrypt/src/lib.rs
index b323e326..eea540f5 100644
--- a/src/_bcrypt/src/lib.rs
+++ b/src/_bcrypt/src/lib.rs
@@ -4,11 +4,17 @@
 
 #![deny(rust_2018_idioms)]
 
+use base64::Engine;
 use std::convert::TryInto;
 
+pub const BASE64_ENGINE: base64::engine::GeneralPurpose = base64::engine::GeneralPurpose::new(
+    &base64::alphabet::BCRYPT,
+    base64::engine::general_purpose::NO_PAD,
+);
+
 #[pyo3::prelude::pyfunction]
 fn encode_base64<'p>(py: pyo3::Python<'p>, data: &[u8]) -> &'p pyo3::types::PyBytes {
-    let output = base64::encode_config(data, base64::BCRYPT);
+    let output = BASE64_ENGINE.encode(data);
     pyo3::types::PyBytes::new(py, output.as_bytes())
 }
 
@@ -44,7 +50,8 @@ fn hashpass<'p>(
     // The last component can contain either just the salt, or the salt and
     // the result hash, depending on if the `salt` value come from `hashpw` or
     // `gensalt`.
-    let raw_salt = base64::decode_config(&raw_parts[2][..22], base64::BCRYPT)
+    let raw_salt = BASE64_ENGINE
+        .decode(&raw_parts[2][..22])
         .map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?
         .try_into()
         .map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?;