diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1071f0a3..64474503 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,13 +36,13 @@ jobs:
             toolchain: stable
             deps: true
           - platform: ubuntu-latest
-            toolchain: 1.47.0 # MSRV
+            toolchain: 1.51.0 # MSRV
             deps: sudo apt-get install libpcsclite-dev
           - platform: windows-latest
-            toolchain: 1.47.0 # MSRV
+            toolchain: 1.51.0 # MSRV
             deps: true
           - platform: macos-latest
-            toolchain: 1.47.0 # MSRV
+            toolchain: 1.51.0 # MSRV
             deps: true
     runs-on: ${{ matrix.platform }}
     steps:
@@ -82,7 +82,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.47.0 # MSRV
+          toolchain: 1.51.0 # MSRV
           components: clippy
           override: true
       - run: sudo apt-get install libpcsclite-dev
diff --git a/Cargo.lock b/Cargo.lock
index 9ebd027b..75a6ce7b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -59,19 +59,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8942c8d352ae1838c9dda0b0ca2ab657696ef2232a20147cf1b30ae1a9cb4321"
 dependencies = [
  "funty",
- "radium 0.5.3",
- "tap",
- "wyz",
-]
-
-[[package]]
-name = "bitvec"
-version = "0.20.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7774144344a4faa177370406a7ff5f1da24303817368584c6206c8303eb07848"
-dependencies = [
- "funty",
- "radium 0.6.2",
+ "radium",
  "tap",
  "wyz",
 ]
@@ -133,9 +121,9 @@ dependencies = [
 
 [[package]]
 name = "const-oid"
-version = "0.5.2"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "279bc8fc53f788a75c7804af68237d1fce02cde1e275a886a4b320604dc2aeda"
+checksum = "44c32f031ea41b4291d695026c023b95d59db2d8a2c7640800ed56bc8f510f22"
 
 [[package]]
 name = "cookie-factory"
@@ -152,6 +140,18 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crypto-bigint"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b32a398eb1ccfbe7e4f452bc749c44d38dd732e9a253f19da224c416f00ee7f4"
+dependencies = [
+ "generic-array",
+ "rand_core",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "crypto-mac"
 version = "0.11.0"
@@ -170,12 +170,11 @@ checksum = "3ee2393c4a91429dffb4bedf19f4d6abf27d8a732c8ce4980305d782e5426d57"
 
 [[package]]
 name = "der"
-version = "0.3.5"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2eeb9d92785d1facb50567852ce75d0858630630e7eabea59cf7eb7474051087"
+checksum = "49f215f706081a44cb702c71c39a52c05da637822e9c1645a50b7202689e982d"
 dependencies = [
  "const-oid",
- "typenum",
 ]
 
 [[package]]
@@ -225,9 +224,9 @@ dependencies = [
 
 [[package]]
 name = "ecdsa"
-version = "0.11.1"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34d33b390ab82f2e1481e331dbd0530895640179d2128ef9a79cc690b78d1eba"
+checksum = "05cb0ed2d2ce37766ac86c05f66973ace8c51f7f1533bedce8fb79e2b54b3f14"
 dependencies = [
  "der",
  "elliptic-curve",
@@ -237,11 +236,11 @@ dependencies = [
 
 [[package]]
 name = "elliptic-curve"
-version = "0.9.12"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c13e9b0c3c4170dcc2a12783746c4205d98e18957f57854251eea3f9750fe005"
+checksum = "dd035cb119cbc25e91bb6f1abbfe341388ddb47a1fe5e77ca6bcbe231e87580b"
 dependencies = [
- "bitvec 0.20.4",
+ "crypto-bigint",
  "ff",
  "generic-array",
  "group",
@@ -266,11 +265,10 @@ dependencies = [
 
 [[package]]
 name = "ff"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72a4d941a5b7c2a75222e2d44fcdf634a67133d9db31e177ae5ff6ecda852bfe"
+checksum = "63eec06c61e487eecf0f7e6e6372e596a81922c28d33e645d6983ca6493a1af0"
 dependencies = [
- "bitvec 0.20.4",
  "rand_core",
  "subtle",
 ]
@@ -315,9 +313,9 @@ dependencies = [
 
 [[package]]
 name = "group"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61b3c1e8b4f1ca07e6605ea1be903a5f6956aec5c8a67fd44d56076631675ed8"
+checksum = "1c363a5301b8f153d80747126a04b3c82073b9fe3130571a9d170cacdeaf7912"
 dependencies = [
  "ff",
  "rand_core",
@@ -433,7 +431,7 @@ version = "6.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c5c51b9083a3c620fa67a2a635d1ce7d95b897e957d6b28ff9a5da960a103a6"
 dependencies = [
- "bitvec 0.19.5",
+ "bitvec",
  "funty",
  "lexical-core",
  "memchr",
@@ -524,9 +522,9 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
 name = "p256"
-version = "0.8.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f05f5287453297c4c16af5e2b04df8fd2a3008d70f252729650bc6d7ace5844"
+checksum = "d053368e1bae4c8a672953397bd1bd7183dde1c72b0b7612a15719173148d186"
 dependencies = [
  "ecdsa",
  "elliptic-curve",
@@ -535,9 +533,9 @@ dependencies = [
 
 [[package]]
 name = "p384"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94e3bfd7d8f202c293072de214ad93480b533985bfee4fa4a13cfdd185fab13d"
+checksum = "f23bc88c404ccc881c8a1ad62ba5cd7d336a64ecbf46de4874f2ad955f67b157"
 dependencies = [
  "elliptic-curve",
 ]
@@ -583,9 +581,9 @@ dependencies = [
 
 [[package]]
 name = "pkcs8"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9c2f795bc591cb3384cb64082a578b89207ac92bb89c9d98c1ea2ace7cd8110"
+checksum = "09d156817ae0125e8aa5067710b0db24f0984830614f99875a70aa5e3b74db69"
 dependencies = [
  "der",
  "spki",
@@ -627,12 +625,6 @@ version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "941ba9d78d8e2f7ce474c015eea4d9c6d25b6a3327f9832ee29a4de27f91bbb8"
 
-[[package]]
-name = "radium"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "643f8f41a8ebc4c5dc4515c82bb8abd397b527fc20fd681b7c011c2aee5d44fb"
-
 [[package]]
 name = "rand"
 version = "0.8.4"
@@ -823,9 +815,9 @@ checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
 [[package]]
 name = "spki"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dae7e047abc519c96350e9484a96c6bf1492348af912fd3446dd2dc323f6268"
+checksum = "987637c5ae6b3121aba9d513f869bd2bff11c4cc086c22473befd6649c0bd521"
 dependencies = [
  "der",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 09851c57..e76c863b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ chrono = "0.4"
 cookie-factory = "0.3"
 der-parser = "5"
 des = "0.7"
-elliptic-curve = "0.9"
+elliptic-curve = "0.10"
 getrandom = "0.1"
 hmac = "0.11"
 log = "0.4"
@@ -35,8 +35,8 @@ num-bigint-dig = { version = "0.7", features = ["rand"], package = "num-bigint-d
 num-traits = "0.2"
 num-integer = "0.1"
 pbkdf2 = { version = "0.8", default-features = false }
-p256 = "0.8"
-p384 = "0.7"
+p256 = "0.9"
+p384 = "0.8"
 pcsc = "2"
 rsa = "0.4"
 secrecy = "0.7"
diff --git a/README.md b/README.md
index 01ff22ac..4cfb5299 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ endorsed by Yubico.
 
 ## Minimum Supported Rust Version
 
-- Rust **1.46** or newer
+Rust **1.51** or newer.
 
 ## Supported YubiKeys
 
@@ -194,7 +194,7 @@ or conditions.
 [docs-link]: https://docs.rs/yubikey/
 [license-image]: https://img.shields.io/badge/license-BSD-blue.svg
 [license-link]: https://github.com/iqlusioninc/yubikey.rs/blob/main/COPYING
-[rustc-image]: https://img.shields.io/badge/rustc-1.46+-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.51+-blue.svg
 [maintenance-image]: https://img.shields.io/badge/maintenance-experimental-blue.svg
 [safety-image]: https://img.shields.io/badge/unsafe-forbidden-success.svg
 [safety-link]: https://github.com/rust-secure-code/safety-dance/
diff --git a/src/lib.rs b/src/lib.rs
index ee332cde..f8b3d694 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,7 +14,7 @@
 //!
 //! ## Minimum Supported Rust Version
 //!
-//! Rust 1.44+
+//! Rust **1.51** or newer.
 //!
 //! ## Supported YubiKeys
 //!