diff --git a/Cargo.lock b/Cargo.lock
index b92d0c8..22374ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -181,10 +181,10 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b77c319abfd5219629c45c34c89ba945ed3c5e49fcde9d16b6c3885f118a730"
 dependencies = [
- "const-oid",
- "der",
- "spki",
- "x509-cert",
+ "const-oid 0.9.6",
+ "der 0.7.10",
+ "spki 0.7.3",
+ "x509-cert 0.2.5",
 ]
 
 [[package]]
@@ -199,6 +199,12 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
+[[package]]
+name = "const-oid"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
@@ -266,10 +272,23 @@ version = "0.7.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7c1832837b905bbfb5101e07cc24c8deddf52f93225eee6ead5f4d63d53ddcb"
 dependencies = [
- "const-oid",
- "der_derive",
+ "const-oid 0.9.6",
+ "der_derive 0.7.3",
+ "flagset",
+ "pem-rfc7468 0.7.0",
+ "zeroize",
+]
+
+[[package]]
+name = "der"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a69dedd701da44b0536442edf09c81a64b0ab97a7a4a5e3d1971f00027cbc63d"
+dependencies = [
+ "const-oid 0.10.2",
+ "der_derive 0.8.0",
  "flagset",
- "pem-rfc7468",
+ "pem-rfc7468 1.0.0",
  "zeroize",
 ]
 
@@ -284,6 +303,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "der_derive"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59600e2c2d636fde9b65e99cc6445ac770c63d3628195ff39932b8d6d7409903"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -291,7 +321,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer",
- "const-oid",
+ "const-oid 0.9.6",
  "crypto-common",
 ]
 
@@ -503,7 +533,7 @@ name = "mpa"
 version = "23.0.0"
 dependencies = [
  "chrono",
- "der",
+ "der 0.7.10",
  "fern",
  "log",
  "myna",
@@ -520,7 +550,7 @@ dependencies = [
  "base64ct",
  "clap",
  "cms",
- "der",
+ "der 0.7.10",
  "fern",
  "flate2",
  "libc",
@@ -529,8 +559,8 @@ dependencies = [
  "rsa",
  "sha1",
  "sha2",
- "spki",
- "x509-cert",
+ "spki 0.7.3",
+ "x509-cert 0.3.0",
 ]
 
 [[package]]
@@ -633,6 +663,15 @@ dependencies = [
  "base64ct",
 ]
 
+[[package]]
+name = "pem-rfc7468"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6305423e0e7738146434843d1694d621cce767262b2a86910beab705e4493d9"
+dependencies = [
+ "base64ct",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
@@ -645,9 +684,9 @@ version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8ffb9f10fa047879315e6625af03c164b16962a5368d724ed16323b68ace47f"
 dependencies = [
- "der",
+ "der 0.7.10",
  "pkcs8",
- "spki",
+ "spki 0.7.3",
 ]
 
 [[package]]
@@ -656,8 +695,8 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f950b2377845cebe5cf8b5165cb3cc1a5e0fa5cfa3e1f7f55707d8fd82e0a7b7"
 dependencies = [
- "der",
- "spki",
+ "der 0.7.10",
+ "spki 0.7.3",
 ]
 
 [[package]]
@@ -728,7 +767,7 @@ version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8573f03f5883dcaebdfcf4725caa1ecb9c15b2ef50c43a07b816e06799bb12d"
 dependencies = [
- "const-oid",
+ "const-oid 0.9.6",
  "digest",
  "num-bigint-dig",
  "num-integer",
@@ -739,7 +778,7 @@ dependencies = [
  "sha1",
  "sha2",
  "signature",
- "spki",
+ "spki 0.7.3",
  "subtle",
  "zeroize",
 ]
@@ -877,7 +916,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d91ed6c858b01f942cd56b37a94b3e0a1798290327d1236e4d9cf4eaca44d29d"
 dependencies = [
  "base64ct",
- "der",
+ "der 0.7.10",
+]
+
+[[package]]
+name = "spki"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d9efca8738c78ee9484207732f728b1ef517bbb1833d6fc0879ca898a522f6f"
+dependencies = [
+ "base64ct",
+ "der 0.8.1",
 ]
 
 [[package]]
@@ -1073,9 +1122,20 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1301e935010a701ae5f8655edc0ad17c44bad3ac5ce8c39185f75453b720ae94"
 dependencies = [
- "const-oid",
- "der",
- "spki",
+ "const-oid 0.9.6",
+ "der 0.7.10",
+ "spki 0.7.3",
+]
+
+[[package]]
+name = "x509-cert"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "105ef4642d9cb137ef83d623d0e4bf08b8adf69e9918ca904a174adb6d3d038b"
+dependencies = [
+ "const-oid 0.10.2",
+ "der 0.8.1",
+ "spki 0.8.0",
  "tls_codec",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 8234245..6a11fa6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ fern = "0.7.1"
 sha1 = "0.10"
 sha2 = "0.10"
 spki = "0.7"
-x509-cert = "0.2"
+x509-cert = "0.3"
 
 [features]
 dummy = []