diff --git a/extensions/base/mediawiki.py b/extensions/base/mediawiki.py
index 682c11a..ee2df83 100644
--- a/extensions/base/mediawiki.py
+++ b/extensions/base/mediawiki.py
@@ -634,7 +634,7 @@ def embed_block_block(ctx: Context, change: dict):
     if block_flags:
         embed.add_field(ctx._("Block flags"), ", ".join(
             block_flags))  # TODO Translate flags into MW messages, this requires making additional request in init_request since we want to get all messages with prefix (amprefix) block-log-flags- and that parameter is exclusive with ammessages
-    embed["title"] = ctx._("Blocked {blocked_user} {time}").format(blocked_user=user, time=block_expiry(change, ctx))
+    embed["title"] = ctx._("Blocked {blocked_user} {time}").format(blocked_user=sanitize_to_markdown(user), time=block_expiry(change, ctx))
     embed_helper(ctx, embed, change)
     return embed