diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index c6aebe2..6ebc24f 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -35,7 +35,7 @@ jobs:
     strategy:
       matrix:
         toolchain:
-          - 1.39.0
+          - 1.41.0
           - stable
     runs-on: ubuntu-latest
     steps:
@@ -75,7 +75,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.39.0
+          - 1.41.0
           - stable
     runs-on: ${{ matrix.platform }}
     steps:
diff --git a/Cargo.lock b/Cargo.lock
index aec7181..28f89f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aho-corasick"
-version = "0.7.10"
+version = "0.7.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
 dependencies = [
  "memchr",
 ]
@@ -46,9 +46,9 @@ checksum = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
 
 [[package]]
 name = "base64"
-version = "0.12.1"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53d1ccbaf7d9ec9537465a97bf19edc1a4e158ecb49fc16178202238c569cc42"
+checksum = "e223af0dc48c96d4f8342ec01a4974f139df863896b316681efd36742f22cc67"
 
 [[package]]
 name = "bitflags"
@@ -155,6 +155,18 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "der-oid-macro"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74708de7d12618cef724cea09e925ab1ce7469b1e4b43834172bcb735db64bcd"
+dependencies = [
+ "nom",
+ "num-bigint",
+ "num-traits",
+ "proc-macro-hack",
+]
+
 [[package]]
 name = "der-parser"
 version = "3.0.4"
@@ -166,6 +178,20 @@ dependencies = [
  "rusticata-macros",
 ]
 
+[[package]]
+name = "der-parser"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae822698fe2fa899ac2f33698d0b7b2c6d3f3d17167f3e5a3bda9d832e75103"
+dependencies = [
+ "der-oid-macro",
+ "nom",
+ "num-bigint",
+ "num-traits",
+ "proc-macro-hack",
+ "rusticata-macros",
+]
+
 [[package]]
 name = "des"
 version = "0.4.0"
@@ -470,7 +496,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "216eaa586a190f0a738f2f918511eecfa90f13295abec0e457cdebcceda80cbd"
 dependencies = [
- "base64 0.12.1",
+ "base64 0.12.2",
  "crypto-mac",
  "hmac",
  "rand",
@@ -504,7 +530,7 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "59698ea79df9bf77104aefd39cc3ec990cb9693fb59c3b0a70ddf2646fdffb4b"
 dependencies = [
- "base64 0.12.1",
+ "base64 0.12.2",
  "once_cell",
  "regex",
 ]
@@ -521,6 +547,12 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "237a5ed80e274dbc66f86bd59c1e25edc039660be53194b5fe0a482e0f2612ea"
 
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.18"
@@ -667,9 +699,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.112"
+version = "1.0.114"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "736aac72d1eafe8e5962d1d1c3d99b0df526015ba40915cb3c49d042e92ec243"
+checksum = "5317f7588f0a5078ee60ef675ef96735a1442132dc645eb1d12c018620ed8cd3"
 
 [[package]]
 name = "sha-1"
@@ -753,9 +785,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.31"
+version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5304cfdf27365b7585c25d4af91b35016ed21ef88f17ced89c7093b43dba8b6"
+checksum = "e8d5d96e8cbb005d6959f119f773bfaebb5684296108fb32600c00cde305b2cd"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -785,18 +817,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b13f926965ad00595dd129fa12823b04bbf866e9085ab0a5f2b05b850fbfc344"
+checksum = "7dfdd070ccd8ccb78f4ad66bf1982dc37f620ef696c6b5028fe2ed83dd3d0d08"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "893582086c2f98cde18f906265a65b5030a074b1046c674ae898be6519a7f479"
+checksum = "bd80fc12f73063ac132ac92aceea36734f04a1d93c1240c6944e23a3b8841793"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -964,7 +996,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6dba437c45e779568868b2c46ed1d1c57c98d9f868e47c9bcbfe9114d4cbd97d"
 dependencies = [
  "base64 0.11.0",
- "der-parser",
+ "der-parser 3.0.4",
+ "nom",
+ "num-bigint",
+ "rusticata-macros",
+ "time",
+]
+
+[[package]]
+name = "x509-parser"
+version = "0.8.0-beta1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cada6d0fb73e366e5b6a3b605f314a14a2453a34b9bfb71455257eff5563988e"
+dependencies = [
+ "base64 0.12.2",
+ "der-oid-macro",
+ "der-parser 4.0.0",
+ "lazy_static",
  "nom",
  "num-bigint",
  "rusticata-macros",
@@ -982,7 +1030,7 @@ dependencies = [
  "sha2 0.8.2",
  "subtle-encoding",
  "termcolor",
- "x509-parser",
+ "x509-parser 0.7.0",
  "yubikey-piv",
 ]
 
@@ -992,7 +1040,7 @@ version = "0.0.3"
 dependencies = [
  "chrono",
  "cookie-factory",
- "der-parser",
+ "der-parser 4.0.0",
  "des",
  "elliptic-curve",
  "env_logger",
@@ -1016,7 +1064,7 @@ dependencies = [
  "subtle",
  "subtle-encoding",
  "x509",
- "x509-parser",
+ "x509-parser 0.8.0-beta1",
  "zeroize",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 109a3ed..263070b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ maintenance = { status = "experimental" }
 [dependencies]
 chrono = "0.4"
 cookie-factory = "0.3"
-der-parser = "3"
+der-parser = "4"
 des = "0.4"
 elliptic-curve = { version = "0.4", features = ["weierstrass"] }
 getrandom = "0.1"
@@ -45,7 +45,7 @@ sha2 = "0.9"
 subtle = "2"
 subtle-encoding = "0.5"
 x509 = "0.1.2"
-x509-parser = "0.7"
+x509-parser = "0.8.0-beta1"
 zeroize = "1"
 
 [dev-dependencies]