diff --git a/packages/isomorphic/HISTORY.md b/packages/isomorphic/HISTORY.md
index d758b1e4..155182ce 100644
--- a/packages/isomorphic/HISTORY.md
+++ b/packages/isomorphic/HISTORY.md
@@ -1,5 +1,11 @@
 # @xrplf/isomorphic Release History
 
+## Unreleased
+
+### Fixed
+
+* Throw error if `hexToBytes` or `hexToString` is provided a string that is not in hex
+
 ## 1.0.0 (2024-02-01)
 
 Initial release providing isomorphic and tree-shakable implementations of:
@@ -14,21 +20,3 @@ Initial release providing isomorphic and tree-shakable implementations of:
 * randomBytes
 * stringToHex
 * ws
-
-## 1.0.0 Beta 1 (2023-11-30)
-
-## Added
-* hexToString
-* stringToHex
-
-## 1.0.0 Beta 0 (2023-10-19)
-
-Initial release providing isomorphic and tree-shakable implementations of:
-
-* ripemd160
-* sha256
-* sha512
-* bytesToHash
-* hashToBytes
-* randomBytes
-* ws_
diff --git a/packages/isomorphic/src/utils/browser.ts b/packages/isomorphic/src/utils/browser.ts
index 89bcf8f8..a9fd016b 100644
--- a/packages/isomorphic/src/utils/browser.ts
+++ b/packages/isomorphic/src/utils/browser.ts
@@ -9,6 +9,7 @@ import type {
   RandomBytesFn,
   StringToHexFn,
 } from './types'
+import { HEX_REGEX } from './shared'
 
 /* eslint-disable func-style -- Typed to ensure uniformity between node and browser implementations and docs */
 export const bytesToHex: typeof BytesToHexFn = (bytes) => {
@@ -22,6 +23,9 @@ export const bytesToHex: typeof BytesToHexFn = (bytes) => {
 export const hexToBytes: typeof HexToBytesFn = (hex): Uint8Array => {
   const len = hex.length
   const array = new Uint8Array(len / 2)
+  if (!HEX_REGEX.test(hex)) {
+    throw new Error('Invalid hex string')
+  }
   for (let i = 0; i < array.length; i++) {
     const j = i * 2
     const hexByte = hex.slice(j, j + 2)
diff --git a/packages/isomorphic/src/utils/index.ts b/packages/isomorphic/src/utils/index.ts
index 0a57ee55..70cd22c0 100644
--- a/packages/isomorphic/src/utils/index.ts
+++ b/packages/isomorphic/src/utils/index.ts
@@ -1,6 +1,7 @@
 import { randomBytes as cryptoRandomBytes } from 'crypto'
 import type { BytesToHexFn, HexToBytesFn, RandomBytesFn } from './types'
 import { HexToStringFn, StringToHexFn } from './types'
+import { HEX_REGEX } from './shared'
 
 const OriginalBuffer = Symbol('OriginalBuffer')
 
@@ -64,6 +65,9 @@ export const bytesToHex: typeof BytesToHexFn = (bytes) => {
 }
 
 export const hexToBytes: typeof HexToBytesFn = (hex) => {
+  if (!HEX_REGEX.test(hex)) {
+    throw new Error('Invalid hex string')
+  }
   return toUint8Array(Buffer.from(hex, 'hex'))
 }
 
@@ -75,6 +79,9 @@ export const hexToString: typeof HexToStringFn = (
   hex: string,
   encoding = 'utf8',
 ): string => {
+  if (!HEX_REGEX.test(hex)) {
+    throw new Error('Invalid hex string')
+  }
   return new TextDecoder(encoding).decode(hexToBytes(hex))
 }
 
diff --git a/packages/isomorphic/src/utils/shared.ts b/packages/isomorphic/src/utils/shared.ts
index 408c07f9..890a42d9 100644
--- a/packages/isomorphic/src/utils/shared.ts
+++ b/packages/isomorphic/src/utils/shared.ts
@@ -1,5 +1,7 @@
 import { concatBytes } from '@noble/hashes/utils'
 
+export const HEX_REGEX = /^[A-F0-9]*$/iu
+
 export function concat(views: Uint8Array[]): Uint8Array {
   return concatBytes(...views)
 }
diff --git a/packages/isomorphic/test/utils.test.ts b/packages/isomorphic/test/utils.test.ts
index 4953a457..02a692e9 100644
--- a/packages/isomorphic/test/utils.test.ts
+++ b/packages/isomorphic/test/utils.test.ts
@@ -23,10 +23,18 @@ describe('utils', function () {
     expect(hexToBytes('DEADBEEF')).toEqual(new Uint8Array([222, 173, 190, 239]))
   })
 
+  it('hexToBytes - DEADBEEF', () => {
+    expect(hexToBytes('DEADBEEF')).toEqual(new Uint8Array([222, 173, 190, 239]))
+  })
+
   it('bytesToHex - DEADBEEF', () => {
     expect(bytesToHex([222, 173, 190, 239])).toEqual('DEADBEEF')
   })
 
+  it('bytesToHex - bad hex', () => {
+    expect(() => hexToBytes('hello')).toThrow(new Error('Invalid hex string'))
+  })
+
   it('bytesToHex - 010203', () => {
     expect(bytesToHex([1, 2, 3])).toEqual('010203')
   })
@@ -43,6 +51,10 @@ describe('utils', function () {
     expect(hexToString('6465616462656566D68D')).toEqual('deadbeef֍')
   })
 
+  it('hexToString - bad hex', () => {
+    expect(() => hexToString('hello')).toThrow(new Error('Invalid hex string'))
+  })
+
   it('stringToHex - deadbeef+infinity symbol (utf8)', () => {
     expect(stringToHex('deadbeef֍')).toEqual('6465616462656566D68D')
   })
diff --git a/packages/ripple-address-codec/HISTORY.md b/packages/ripple-address-codec/HISTORY.md
index ce2ca026..d3d33c4b 100644
--- a/packages/ripple-address-codec/HISTORY.md
+++ b/packages/ripple-address-codec/HISTORY.md
@@ -15,25 +15,6 @@
 * Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
 * Execute test in a browser in addition to node
 
-## 5.0.0 Beta 1 (2023-11-30)
-
-### Breaking Changes
-* `Buffer` has been replaced with `UInt8Array` for both params and return values. `Buffer` may continue to work with params since they extend `UInt8Arrays`.
-
-### Changes
-* Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
-
-## 5.0.0 Beta 0 (2023-10-19)
-
-### Breaking Changes
-* Bump typescript to 5.x
-* Remove Node 14 support
-* Remove `assert` dependency. If you were catching `AssertionError` you need to change to `Error`.
-* Remove `create-hash` in favor of `@noble/hashes`
-
-### Changes
-* Execute test in a browser in addition to node
-
 ## 4.3.1 (2023-09-27)
 ### Fixed
 * Fix source-maps not finding their designated source
diff --git a/packages/ripple-binary-codec/HISTORY.md b/packages/ripple-binary-codec/HISTORY.md
index fdf9ecb3..871c2020 100644
--- a/packages/ripple-binary-codec/HISTORY.md
+++ b/packages/ripple-binary-codec/HISTORY.md
@@ -22,23 +22,6 @@
   * `Comparable` is now a generic type so that it allows `compareTo` methods to take more that the type itself.
 * Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
 
-## 2.0.0 Beta 1 (2023-11-30)
-
-### Breaking Changes
-* `Buffer` has been replaced with `UInt8Array` for both params and return values. `Buffer` may continue to work with params since they extend `UInt8Arrays`.
-
-### Changes
-* Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
-
-## 2.0.0 Beta 0 (2023-10-19)
-
-### Breaking Changes
-* Bump typescript to 5.x
-* Remove Node 14 support
-* Remove decimal.js and big-integer. Use `BigNumber` from `bignumber.js` instead of `Decimal` and the native `BigInt` instead of `bigInt`.
-* Remove `assert` dependency. If you were catching `AssertionError` you need to change to `Error`.
-* Remove `create-hash` in favor of `@noble/hashes`
-
 ### Changes
 * Update type definitions which causing errors in tests that the code already supported
     * `makeParser` to accept a `Buffer` in addition to `string`
diff --git a/packages/ripple-keypairs/HISTORY.md b/packages/ripple-keypairs/HISTORY.md
index 6a20d8af..7f4003b3 100644
--- a/packages/ripple-keypairs/HISTORY.md
+++ b/packages/ripple-keypairs/HISTORY.md
@@ -19,29 +19,6 @@
 * Remove `brorand` as a dependency and use `@xrplf/isomorphic` instead.
 * Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
 
-## 2.0.0 Beta 1 (2023-11-30)
-
-### Breaking Changes
-* `Buffer` has been replaced with `UInt8Array` for both params and return values. `Buffer` may continue to work with params since they extend `UInt8Arrays`.
-
-### Changes
-* Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
-
-## 2.0.0 Beta 0 (2023-10-19)
-
-### Breaking Changes
-* Bump typescript to 5.x
-* Remove Node 14 support
-* Remove `assert` dependency. If you were catching `AssertionError` you need to change to `Error`.
-* Fix `deriveKeypair` ignoring manual decoding algorithm. (Specifying algorithm=`ed25519` in `opts` now works on secrets like `sNa1...`)
-* Remove `crypto` polyfills, `create-hash`, `elliptic`, `hash.js`, and their many dependencies in favor of `@noble/hashes` and `@nobel/curves`
-* Remove `bytesToHex` and `hexToBytes`.  They can now be found in `@xrplf/isomorphic/utils`
-* `verifyTransaction` will throw an error if there is no signature
-* Improved key algorithm detection. It will now throw Errors with helpful messages
-
-### Changes
-* Remove `brorand` as a dependency and use `@xrplf/isomorphic` instead.
-
 ## 1.3.1 (2023-09-27)
 ### Fixed
 * Fix source-maps not finding their designated source
diff --git a/packages/secret-numbers/HISTORY.md b/packages/secret-numbers/HISTORY.md
index 366bfbfc..15311a3e 100644
--- a/packages/secret-numbers/HISTORY.md
+++ b/packages/secret-numbers/HISTORY.md
@@ -19,24 +19,3 @@ Subscribe to [the **xrpl-announce** mailing list](https://groups.google.com/g/xr
 * Unit tests run in a browser and node.
 * Remove `brorand` as a dependency and use `@xrplf/isomorphic` instead.
 * Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
-
-## 1.0.0 Beta 1 (2023-11-30)
-
-### BREAKING CHANGES:
-* Moved all methods that were on `Utils` are now individually exported.
-* `Buffer` has been replaced with `UInt8Array` for both params and return values. `Buffer` may continue to work with params since they extend `UInt8Arrays`.
-
-### Changes
-* Eliminates 4 runtime dependencies: `base-x`, `base64-js`, `buffer`, and `ieee754`.
-
-## 1.0.0 Beta 0 (2023-10-19)
-
-* Add `xrpl-secret-numbers` by @WietseWind  to the mono repo.
-* `unpkg` and `jsdelivr` support was simplified.
-* Unit tests run in a browser and node.
-* Remove `brorand` as a dependency and use `@xrplf/isomorphic` instead.
-
-### BREAKING CHANGES:
-* `xrpl-secret-numbers` is now `@xrplf/secret-numbers`.
-* The bundled file produced changed from  `dist/browerified.js` to `build/xrplf-secret-numbers-latest.js`.
-* Bundle variable is `xrplf_secret_numbers` instead of using browserify's loader.