diff --git a/CHANGELOG.md b/CHANGELOG.md
index b066dd9..7beb113 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project are documented here. Format loosely
 follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versions
 correspond to git tags (`vX.Y.Z`) and `nodejs/package.json`'s `version`.
 
+## [1.5.1] - 2026-07-27
+
+### Fixed
+- **`PUT /api/user/:uid` 500'd with `ObjectClassViolationError` (LDAP `0x41`) when setting `sshPublicKey`** on any account created before the `ldapPublicKey` auxiliary objectClass was added to new-user creation (e.g. the bootstrap `admin` account). `User.update`'s `sshPublicKey` handling and `User.addSSHkey` (`nodejs/models/user_ldap.js`) now add the `ldapPublicKey` objectClass first (ignoring `TypeOrValueExistsError` if already present), the same pattern already used for `dateOfBirth`/`theta42Person`.
+- **OAuth Integration parent dropdown was blank.** `populateHostDropdown` in `nodejs/views/directory.ejs` only built options for `kind === 'host'` and `kind === 'service'` — there was no branch for `kind === 'oauth'`, so choosing "OAuth Integration" in the Directory's add-resource modal left the parent-Service picker empty except the placeholder. Added the missing branch.
+
 ## [1.5.0] - 2026-07-26
 
 ### Changed
diff --git a/nodejs/models/user_ldap.js b/nodejs/models/user_ldap.js
index dd82393..e7afd01 100644
--- a/nodejs/models/user_ldap.js
+++ b/nodejs/models/user_ldap.js
@@ -473,6 +473,19 @@ User.update = async function(data){
 			}
 
 			if(data.sshPublicKey){
+				// Ensure the auxiliary objectClass is present before setting the attribute
+				// -- accounts created before ldapPublicKey was added to addPosixAccount's
+				// objectclass list (e.g. the bootstrap admin) won't have it yet.
+				try {
+					await client.modify(this.dn, [
+						new Change({
+							operation: 'add',
+							modification: new Attribute({ type: 'objectClass', values: ['ldapPublicKey'] }),
+						}),
+					]);
+				} catch(e) {
+					if(e.name !== 'TypeOrValueExistsError') throw e;
+				}
 				await client.modify(this.dn, [
 					new Change({
 						operation: 'replace',
@@ -784,6 +797,19 @@ User.addSSHkey = async function(data) {
 	let result;
 	try {
 		await withClient(async (client) => {
+			// Ensure the auxiliary objectClass is present before setting the attribute
+			// -- accounts created before ldapPublicKey was added to addPosixAccount's
+			// objectclass list (e.g. the bootstrap admin) won't have it yet.
+			try {
+				await client.modify(user.dn, [
+					new Change({
+						operation: 'add',
+						modification: new Attribute({ type: 'objectClass', values: ['ldapPublicKey'] }),
+					}),
+				]);
+			} catch(e) {
+				if (e.name !== 'TypeOrValueExistsError') throw e;
+			}
 			await client.modify(user.dn, [
 				new Change({
 					operation: 'add',
diff --git a/nodejs/package.json b/nodejs/package.json
index ae51b96..19a80c4 100755
--- a/nodejs/package.json
+++ b/nodejs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "t42-sso-manager",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "A very simple LDAP management and SSO system",
   "author": [
     {
diff --git a/nodejs/views/directory.ejs b/nodejs/views/directory.ejs
index 955cef6..465f9db 100644
--- a/nodejs/views/directory.ejs
+++ b/nodejs/views/directory.ejs
@@ -572,6 +572,8 @@
         $target.append($('<option>').val(r.id).text(r.name + ' (' + r.slug + ')'));
       } else if (kind === 'service' && (r.kind === 'host' || r.kind === 'service')) {
         $target.append($('<option>').val(r.id).text(r.name + ' (' + r.slug + ')'));
+      } else if (kind === 'oauth' && r.kind === 'service') {
+        $target.append($('<option>').val(r.id).text(r.name + ' (' + r.slug + ')'));
       }
     });
     if (selectedId) $target.val(selectedId);