diff --git a/Cargo.lock b/Cargo.lock
index a48b44c..a5f8486 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20,6 +20,45 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "asn1-rs"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf6690c370453db30743b373a60ba498fc0d6d83b11f4abfd87a84a075db5dd4"
+dependencies = [
+ "asn1-rs-derive",
+ "asn1-rs-impl",
+ "displaydoc",
+ "nom",
+ "num-traits",
+ "rusticata-macros",
+ "thiserror",
+ "time 0.3.13",
+]
+
+[[package]]
+name = "asn1-rs-derive"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "726535892e8eae7e70657b4c8ea93d26b8553afb1ce617caee529ef96d7dee6c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "asn1-rs-impl"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2777730b2039ac0f95f093556e61b6d26cebed5393ca6f152717777cec3a42ed"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -107,7 +146,7 @@ dependencies = [
  "js-sys",
  "num-integer",
  "num-traits",
- "time",
+ "time 0.1.44",
  "wasm-bindgen",
  "winapi",
 ]
@@ -288,6 +327,20 @@ dependencies = [
  "rusticata-macros",
 ]
 
+[[package]]
+name = "der-parser"
+version = "8.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42d4bc9b0db0a0df9ae64634ac5bdefb7afcb534e182275ca0beadbe486701c1"
+dependencies = [
+ "asn1-rs",
+ "displaydoc",
+ "nom",
+ "num-bigint",
+ "num-traits",
+ "rusticata-macros",
+]
+
 [[package]]
 name = "des"
 version = "0.8.1"
@@ -317,6 +370,17 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "displaydoc"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bf95dc3f046b9da4f2d51833c0d3547d8564ef6910f5c1ed130306a75b92886"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ecdsa"
 version = "0.14.3"
@@ -483,6 +547,12 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
+
 [[package]]
 name = "js-sys"
 version = "0.3.59"
@@ -604,13 +674,31 @@ dependencies = [
  "libm",
 ]
 
+[[package]]
+name = "num_threads"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2819ce041d2ee131036f4fc9d6ae7ae125a3a40e97ba64d04fe799ad9dabbb44"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "oid-registry"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fe554cb2393bc784fd678c82c84cc0599c31ceadc7f03a594911f822cb8d1815"
 dependencies = [
- "der-parser",
+ "der-parser 6.0.1",
+]
+
+[[package]]
+name = "oid-registry"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d4bda43fd1b844cbc6e6e54b5444e2b1bc7838bce59ad205902cccbb26d6761"
+dependencies = [
+ "asn1-rs",
 ]
 
 [[package]]
@@ -1010,6 +1098,18 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "synstructure"
+version = "0.12.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "unicode-xid",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"
@@ -1056,6 +1156,24 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db76ff9fa4b1458b3c7f077f3ff9887394058460d21e634355b273aaf11eea45"
+dependencies = [
+ "itoa",
+ "libc",
+ "num_threads",
+ "time-macros",
+]
+
+[[package]]
+name = "time-macros"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42657b1a6f4d817cda8e7a0ace261fe0cc946cf3a80314390b22cc61ae080792"
+
 [[package]]
 name = "typenum"
 version = "1.15.0"
@@ -1068,6 +1186,12 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "957e51f3646910546462e67d5f7599b9e4fb8acdd304b087a6494730f9eebf04"
+
 [[package]]
 name = "uuid"
 version = "1.1.2"
@@ -1199,21 +1323,39 @@ dependencies = [
  "base64",
  "chrono",
  "data-encoding",
- "der-parser",
+ "der-parser 6.0.1",
  "lazy_static",
  "nom",
- "oid-registry",
+ "oid-registry 0.2.0",
  "rusticata-macros",
  "thiserror",
 ]
 
+[[package]]
+name = "x509-parser"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0ecbeb7b67ce215e40e3cc7f2ff902f94a223acf44995934763467e7b1febc8"
+dependencies = [
+ "asn1-rs",
+ "base64",
+ "data-encoding",
+ "der-parser 8.1.0",
+ "lazy_static",
+ "nom",
+ "oid-registry 0.6.0",
+ "rusticata-macros",
+ "thiserror",
+ "time 0.3.13",
+]
+
 [[package]]
 name = "yubikey"
 version = "0.6.0-pre"
 dependencies = [
  "chrono",
  "cookie-factory",
- "der-parser",
+ "der-parser 8.1.0",
  "des",
  "elliptic-curve",
  "env_logger",
@@ -1237,7 +1379,7 @@ dependencies = [
  "subtle-encoding",
  "uuid",
  "x509",
- "x509-parser",
+ "x509-parser 0.14.0",
  "zeroize",
 ]
 
@@ -1252,7 +1394,7 @@ dependencies = [
  "sha2 0.9.9",
  "subtle-encoding",
  "termcolor",
- "x509-parser",
+ "x509-parser 0.12.0",
  "yubikey",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index e0fb868..610b629 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ members = [".", "cli"]
 [dependencies]
 chrono = "0.4"
 cookie-factory = "0.3"
-der-parser = "6"
+der-parser = "8"
 des = "0.8"
 elliptic-curve = "0.12"
 hmac = "0.12"
@@ -44,7 +44,7 @@ subtle = "2"
 subtle-encoding = "0.5"
 uuid = { version = "1.0", features = ["v4"] }
 x509 = "0.2"
-x509-parser = "0.12"
+x509-parser = "0.14"
 zeroize = "1"
 
 [dev-dependencies]
diff --git a/src/certificate.rs b/src/certificate.rs
index 7dc1332..5762707 100644
--- a/src/certificate.rs
+++ b/src/certificate.rs
@@ -190,7 +190,7 @@ impl PublicKeyInfo {
     fn parse(subject_pki: &SubjectPublicKeyInfo<'_>) -> Result<Self> {
         match subject_pki.algorithm.algorithm.to_string().as_str() {
             OID_RSA_ENCRYPTION => {
-                let pubkey = read_pki::rsa_pubkey(subject_pki.subject_public_key.data)?;
+                let pubkey = read_pki::rsa_pubkey(&subject_pki.subject_public_key.data)?;
 
                 Ok(PublicKeyInfo::Rsa {
                     algorithm: match pubkey.n().bits() {
@@ -587,6 +587,7 @@ pub(crate) fn write_certificate(
 
 mod read_pki {
     use der_parser::{
+        asn1_rs::Any,
         ber::BerObjectContent,
         der::{parse_der_integer, parse_der_sequence_defined_g, DerObject},
         error::BerError,
@@ -640,8 +641,8 @@ mod read_pki {
     ///   -- specifiedCurve  SpecifiedECDomain
     /// }
     /// ```
-    pub(super) fn ec_parameters(parameters: &DerObject<'_>) -> Result<AlgorithmId> {
-        let curve_oid = parameters.as_oid_val().map_err(|_| Error::InvalidObject)?;
+    pub(super) fn ec_parameters(parameters: &Any<'_>) -> Result<AlgorithmId> {
+        let curve_oid = parameters.as_oid().map_err(|_| Error::InvalidObject)?;
 
         match curve_oid.to_string().as_str() {
             OID_NIST_P256 => Ok(AlgorithmId::EccP256),