diff --git a/src/pyj/modals.pyj b/src/pyj/modals.pyj
index 8fb343a839..d53f4fde7f 100644
--- a/src/pyj/modals.pyj
+++ b/src/pyj/modals.pyj
@@ -134,6 +134,11 @@ def create_simple_dialog(title, msg, details, icon_name, prefix):
         html_container = E.div()
         if is_html_msg:
             html_container.innerHTML = msg
+        details_container = E.span()
+        if /<[a-zA-Z]/.test(details):
+            details_container.innerHTML = details
+        else:
+            details_container.textContent = details
         parent.appendChild(
             E.div(
                 style='max-width:60em; text-align: left',
@@ -144,7 +149,7 @@ def create_simple_dialog(title, msg, details, icon_name, prefix):
                 E.div((html_container if is_html_msg else msg), style='padding-top: 1em; margin-top: 1em; border-top: 1px solid currentColor'),
                 E.div(style='display: ' + ('block' if details else 'none'),
                     show_details,
-                    E.div(details,
+                    E.div(details_container,
                           style='display:none; white-space:pre-wrap; font-size: smaller; margin-top: 1em; border-top: solid 1px currentColor; padding-top: 1em'
                     )
                 )