diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6602d46..e2a7907 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Hermes Web UI -- Changelog
 
+## [v0.50.52] — 2026-04-15
+
+### Fixed
+- **Simultaneous approval requests** — parallel tool calls that each require approval no longer overwrite each other. `_pending` is now a list per session; each entry gets a stable `approval_id` (uuid4) so `/api/approval/respond` can target a specific request. The UI shows a "1 of N pending" counter when multiple approvals are queued. Backward-compatible with old agent versions and old frontend clients. Adds 14 regression tests. (Fixes #527)
+
 ## [v0.50.51] — 2026-04-15
 
 ### Fixed
diff --git a/static/index.html b/static/index.html
index 8a2c756..522466a 100644
--- a/static/index.html
+++ b/static/index.html
@@ -553,7 +553,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.51</span>
+              <span class="settings-version-badge">v0.50.52</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>