diff --git a/src/rust/Cargo.lock b/src/rust/Cargo.lock
index c8b7af14a..3a15dc19e 100644
--- a/src/rust/Cargo.lock
+++ b/src/rust/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "asn1"
-version = "0.15.3"
+version = "0.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "634568f903dea9a0ba8225469fde6af27e0e34f2c4d66227b086a3375b69a87a"
+checksum = "de594fb2adce376d7955c41e273e1ba22b0476b8763c383362b99c3d78fee593"
 dependencies = [
  "asn1_derive",
 ]
diff --git a/src/rust/Cargo.toml b/src/rust/Cargo.toml
index 36960b630..77a78ee85 100644
--- a/src/rust/Cargo.toml
+++ b/src/rust/Cargo.toml
@@ -10,7 +10,7 @@ rust-version = "1.56.0"
 [dependencies]
 once_cell = "1"
 pyo3 = { version = "0.19", features = ["abi3-py37"] }
-asn1 = { version = "0.15.3", default-features = false }
+asn1 = { version = "0.15.4", default-features = false }
 cryptography-cffi = { path = "cryptography-cffi" }
 cryptography-x509 = { path = "cryptography-x509" }
 cryptography-openssl = { path = "cryptography-openssl" }
diff --git a/src/rust/cryptography-x509/Cargo.toml b/src/rust/cryptography-x509/Cargo.toml
index 7d5aeca8b..166682c42 100644
--- a/src/rust/cryptography-x509/Cargo.toml
+++ b/src/rust/cryptography-x509/Cargo.toml
@@ -8,4 +8,4 @@ publish = false
 rust-version = "1.56.0"
 
 [dependencies]
-asn1 = { version = "0.15.3", default-features = false }
+asn1 = { version = "0.15.4", default-features = false }