diff --git a/src/_bcrypt/Cargo.lock b/src/_bcrypt/Cargo.lock
index 37a1ddcd..79754536 100644
--- a/src/_bcrypt/Cargo.lock
+++ b/src/_bcrypt/Cargo.lock
@@ -14,15 +14,22 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
+[[package]]
+name = "base64"
+version = "0.21.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
+
 [[package]]
 name = "bcrypt"
-version = "0.13.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7e7c93a3fb23b2fdde989b2c9ec4dd153063ec81f408507f84c090cd91c6641"
+checksum = "28d1c9c15093eb224f0baa400f38fcd713fc1391a6f1c389d886beef146d60a3"
 dependencies = [
- "base64",
+ "base64 0.21.2",
  "blowfish",
  "getrandom",
+ "subtle",
  "zeroize",
 ]
 
@@ -41,7 +48,7 @@ dependencies = [
 name = "bcrypt-rust"
 version = "0.1.0"
 dependencies = [
- "base64",
+ "base64 0.13.1",
  "bcrypt",
  "bcrypt-pbkdf",
  "pyo3",
diff --git a/src/_bcrypt/Cargo.toml b/src/_bcrypt/Cargo.toml
index 214bb985..0b2af7c0 100644
--- a/src/_bcrypt/Cargo.toml
+++ b/src/_bcrypt/Cargo.toml
@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 pyo3 = { version = "0.19.1" }
-bcrypt = "0.13"
+bcrypt = "0.15"
 bcrypt-pbkdf = "0.8.1"
 base64 = "0.13.1"