diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63b157d..f33c9a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Hermes Web UI -- Changelog
 
+## [v0.50.50] — 2026-04-15
+
+### Fixed
+- **Code block syntax highlighting** — Prism theme now follows the active UI theme. Light mode uses the default Prism light theme; dark mode uses `prism-tomorrow`. Theme swaps happen immediately on toggle including on first load. Adds `id="prism-theme"` to the Prism CSS link so JavaScript can locate and swap it. (Closes #505, PR #530 by @mariosam95)
+
 ## [v0.50.49] — 2026-04-15
 
 ### Fixed
diff --git a/static/index.html b/static/index.html
index bb5de73..ef38643 100644
--- a/static/index.html
+++ b/static/index.html
@@ -552,7 +552,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.49</span>
+              <span class="settings-version-badge">v0.50.50</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>