diff --git a/Cargo.lock b/Cargo.lock
index f5af32085..451869564 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -19,9 +19,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "aes"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac1f845298e95f983ff1944b728ae08b8cebab80d684f0a832ed0fc74dfa27e2"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
 dependencies = [
  "cfg-if",
  "cipher",
diff --git a/cms/Cargo.toml b/cms/Cargo.toml
index b19465e2a..4e4e95460 100644
--- a/cms/Cargo.toml
+++ b/cms/Cargo.toml
@@ -20,7 +20,7 @@ x509-cert = { version = "=0.3.0-pre", default-features = false, features = ["pem
 const-oid = { version = "=0.10.0-pre.2", features = ["db"] }
 
 # optional dependencies
-aes = { version = "0.8.2", optional = true }
+aes = { version = "0.8.4", optional = true }
 cbc = { version = "0.1.2", optional = true }
 cipher = { version = "0.4.4", features = ["alloc", "block-padding", "rand_core"], optional = true }
 rsa = { version = "=0.10.0-pre.1", optional = true }
diff --git a/pkcs5/Cargo.toml b/pkcs5/Cargo.toml
index 31ca92803..6333664ad 100644
--- a/pkcs5/Cargo.toml
+++ b/pkcs5/Cargo.toml
@@ -20,7 +20,7 @@ spki = { version = "=0.8.0-pre.0" }
 
 # optional dependencies
 cbc = { version = "0.1.2", optional = true }
-aes = { version = "0.8.3", optional = true, default-features = false }
+aes = { version = "0.8.4", optional = true, default-features = false }
 des = { version = "0.8.1", optional = true, default-features = false }
 pbkdf2 = { version = "0.12.1", optional = true, default-features = false }
 rand_core = { version = "0.6.4", optional = true, default-features = false }