diff --git a/.changelog/unreleased/improvements/4818-up-hderive.md b/.changelog/unreleased/improvements/4818-up-hderive.md
new file mode 100644
index 00000000000..8595647ddcf
--- /dev/null
+++ b/.changelog/unreleased/improvements/4818-up-hderive.md
@@ -0,0 +1,2 @@
+- Updated tiny-hderive crate to replace unmaintained memzero crate with zeroize.
+  ([\#4818](https://github.com/namada-net/namada/pull/4818))
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index de6c31f0c5f..04dff11e19d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5230,12 +5230,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d97bbf43eb4f088f8ca469930cde17fa036207c9a5e02ccc5107c4e8b17c964"
 
-[[package]]
-name = "memzero"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93c0d11ac30a033511ae414355d80f70d9f29a44a49140face477117a1ee90db"
-
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -5480,15 +5474,15 @@ dependencies = [
 
 [[package]]
 name = "nam-tiny-hderive"
-version = "0.3.1-nam.0"
+version = "0.3.1-nam.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dfd77f274636f722e966c394b381a70233ed4c25150864a4c53d398028a6818"
+checksum = "b2cd44792ed5cd84dc9dedc3d572242ac00e76c244e85eb4bf34da2c6239ce30"
 dependencies = [
  "base58",
  "hmac",
  "k256",
- "memzero",
  "sha2 0.10.8",
+ "zeroize",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index f21243361b1..a76b8f1c66a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -245,7 +245,7 @@ tendermint-rpc = {version = "0.40.3", default-features = false}
 test-log = {version = "0.2", default-features = false, features = ["trace"]}
 textwrap-macros = "0.3"
 tiny-bip39 = {version = "2.0"}
-tiny-hderive = {package = "nam-tiny-hderive", version = "0.3.1-nam.0"}
+tiny-hderive = {package = "nam-tiny-hderive", version = "0.3.1-nam.1"}
 tiny-keccak = { version = "2.0", features = ["keccak"] }
 thiserror = "2.0"
 tokio = {version = "1.8", default-features = false}
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 66b217f6b98..8a741e6671b 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -3,6 +3,7 @@ name = "namada_fuzz"
 version = "0.251.0"
 publish = false
 edition = "2024"
+license = "GPL-3.0-or-later"
 
 [package.metadata]
 cargo-fuzz = true
diff --git a/scripts/make-package.sh b/scripts/make-package.sh
index 55465071008..b8514304507 100755
--- a/scripts/make-package.sh
+++ b/scripts/make-package.sh
@@ -16,6 +16,6 @@ ln ${BIN} ../../${PACKAGE_NAME} && \
 cd ../.. && \
 ln wasm/*.*.wasm wasm/checksums.json ${PACKAGE_NAME}/wasm && \
 ln LICENSE ${PACKAGE_NAME} && \
-cargo about generate about.hbs --output-file ${PACKAGE_NAME}/LICENSE.thirdparty && \
+cargo about generate about.hbs --fail --output-file ${PACKAGE_NAME}/LICENSE.thirdparty && \
 tar -c -z -f ${PACKAGE_NAME}.tar.gz ${PACKAGE_NAME} && \
 rm -rf ${PACKAGE_NAME}
diff --git a/wasm/Cargo.lock b/wasm/Cargo.lock
index 5157e27581a..88387f24288 100644
--- a/wasm/Cargo.lock
+++ b/wasm/Cargo.lock
@@ -2527,6 +2527,19 @@ version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
+[[package]]
+name = "git2"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2deb07a133b1520dc1a5690e9bd08950108873d7ed5de38dcc74d3b5ebffa110"
+dependencies = [
+ "bitflags 2.8.0",
+ "libc",
+ "libgit2-sys",
+ "log",
+ "url",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.2"
@@ -4022,6 +4035,18 @@ version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
 
+[[package]]
+name = "libgit2-sys"
+version = "0.18.2+1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c42fe03df2bd3c53a3a9c7317ad91d80c81cd1fb0caec8d7cc4cd2bfa10c222"
+dependencies = [
+ "cc",
+ "libc",
+ "libz-sys",
+ "pkg-config",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.11"
@@ -4038,6 +4063,18 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "libz-sys"
+version = "1.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b70e7a7df205e92a1a4cd9aaae7898dac0aa555503cc0a649494d0d60e7651d"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.4.15"
@@ -4214,12 +4251,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d97bbf43eb4f088f8ca469930cde17fa036207c9a5e02ccc5107c4e8b17c964"
 
-[[package]]
-name = "memzero"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93c0d11ac30a033511ae414355d80f70d9f29a44a49140face477117a1ee90db"
-
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -4372,15 +4403,15 @@ dependencies = [
 
 [[package]]
 name = "nam-tiny-hderive"
-version = "0.3.1-nam.0"
+version = "0.3.1-nam.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dfd77f274636f722e966c394b381a70233ed4c25150864a4c53d398028a6818"
+checksum = "b2cd44792ed5cd84dc9dedc3d572242ac00e76c244e85eb4bf34da2c6239ce30"
 dependencies = [
  "base58",
  "hmac",
  "k256",
- "memzero",
  "sha2 0.10.8",
+ "zeroize",
 ]
 
 [[package]]
@@ -4965,6 +4996,7 @@ version = "0.251.0"
 dependencies = [
  "borsh",
  "clru",
+ "git2",
  "nam-wasm-instrument",
  "namada_account",
  "namada_core",