diff --git a/Cargo.lock b/Cargo.lock
index 7fbccf5..c6fc237 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -109,7 +109,7 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdd35008169921d80bc60d3d0ab416eecb028c4cd653352907921d95084790be"
 dependencies = [
- "hybrid-array 0.4.7",
+ "hybrid-array",
 ]
 
 [[package]]
@@ -341,7 +341,7 @@ dependencies = [
  "cpubits",
  "ctutils",
  "getrandom 0.4.1",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "num-traits",
  "rand_core 0.10.0",
  "serdect",
@@ -366,7 +366,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77727bb15fa921304124b128af125e7e3b968275d1b108b379190264f4423710"
 dependencies = [
  "getrandom 0.4.1",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "rand_core 0.10.0",
 ]
 
@@ -537,7 +537,7 @@ dependencies = [
  "crypto-common 0.2.1",
  "digest 0.11.1",
  "hex-literal",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "once_cell",
  "pem-rfc7468",
  "pkcs8 0.11.0-rc.11",
@@ -711,16 +711,6 @@ dependencies = [
  "digest 0.11.1",
 ]
 
-[[package]]
-name = "hybrid-array"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2d35805454dc9f8662a98d6d61886ffe26bd465f5960e0e55345c70d5c0d2a9"
-dependencies = [
- "typenum",
- "zeroize",
-]
-
 [[package]]
 name = "hybrid-array"
 version = "0.4.7"
@@ -756,7 +746,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4250ce6452e92010fdf7268ccc5d14faa80bb12fc741938534c58f16804e03c7"
 dependencies = [
- "hybrid-array 0.4.7",
+ "hybrid-array",
 ]
 
 [[package]]
@@ -834,7 +824,7 @@ dependencies = [
  "getrandom 0.4.1",
  "hex",
  "hex-literal",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "rand_core 0.10.0",
  "sha2 0.11.0-rc.5",
  "signature 3.0.0-rc.10",
@@ -873,7 +863,7 @@ dependencies = [
  "getrandom 0.4.1",
  "hex",
  "hex-literal",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "module-lattice",
  "pkcs8 0.11.0-rc.11",
  "proptest",
@@ -891,7 +881,7 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6dfecc750073acc09af2f8899b2342d520d570392ba1c3aed53eeb0d84ca4103"
 dependencies = [
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "num-traits",
  "zeroize",
 ]
@@ -1279,7 +1269,7 @@ dependencies = [
  "base16ct",
  "ctutils",
  "der 0.8.0",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "serdect",
  "subtle",
  "zeroize",
@@ -1436,7 +1426,7 @@ dependencies = [
  "hex",
  "hex-literal",
  "hmac",
- "hybrid-array 0.4.7",
+ "hybrid-array",
  "num-bigint",
  "paste",
  "pkcs8 0.11.0-rc.11",
@@ -1829,7 +1819,7 @@ dependencies = [
  "const-oid 0.9.6",
  "der 0.7.10",
  "digest 0.10.7",
- "hybrid-array 0.2.3",
+ "hybrid-array",
  "pkcs8 0.10.2",
  "postcard",
  "rand 0.10.0",
diff --git a/xmss/Cargo.toml b/xmss/Cargo.toml
index df1b006..c2f1114 100644
--- a/xmss/Cargo.toml
+++ b/xmss/Cargo.toml
@@ -23,7 +23,7 @@ pkcs8 = ["dep:pkcs8", "dep:spki", "dep:der", "dep:const-oid"]
 const-oid = { version = "0.9", optional = true }
 der = { version = "0.7", optional = true, default-features = false, features = ["alloc"] }
 digest = "0.10"
-hybrid-array = { version = "0.2", features = ["zeroize"] }
+hybrid-array = { version = "0.4", features = ["zeroize"] }
 pkcs8 = { version = "0.10", optional = true, default-features = false, features = ["alloc"] }
 rand = "0.10"
 sha2 = "0.10"