diff --git a/Cargo.lock b/Cargo.lock
index 79bb3de..49b07a7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1179,6 +1179,32 @@ dependencies = [
  "sha2",
 ]
 
+[[package]]
+name = "p384"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70786f51bcc69f6a4c0360e063a4cac5419ef7c5cd5b3c99ad70f3be5ba79209"
+dependencies = [
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "sha2",
+]
+
+[[package]]
+name = "p521"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fc9e2161f1f215afdfce23677034ae137bbd45016a880c2eb3ba8eb95f085b2"
+dependencies = [
+ "base16ct",
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "rand_core",
+ "sha2",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
@@ -1665,9 +1691,9 @@ checksum = "92d43fe69e652f3df9bdc2b85b2854a0825b86e4fb76bc44d945137d053639ca"
 
 [[package]]
 name = "sequoia-openpgp"
-version = "1.20.0"
+version = "1.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06f82708c8568218b8544b4abbba1f6483067dca0a946a54991c1d3f424dcade"
+checksum = "c81335e4cf7506578920b35c011cd76a4b06a876cdef1f02802d53607ff84f49"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -1705,6 +1731,8 @@ dependencies = [
  "num-bigint-dig",
  "once_cell",
  "p256",
+ "p384",
+ "p521",
  "rand",
  "rand_core",
  "regex",
diff --git a/Cargo.toml b/Cargo.toml
index a8e5b82..8de4248 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ once_cell = "1.19"
 openpgp-card = "0.4.2"
 openpgp-card-sequoia = { version = "0.2.1", default-features = false }
 pyo3 = { version = "0.21", features = ["extension-module", "anyhow", "chrono"] }
-sequoia-openpgp = { version = "1.20", default-features = false, features = ["compression"] }
+sequoia-openpgp = { version = "1.21", default-features = false, features = ["compression"] }
 testresult = "0.4"
 
 [target.'cfg(target_os = "linux")'.dependencies]