diff --git a/readme_renderer/clean.py b/readme_renderer/clean.py
index 747bab8..386e684 100644
--- a/readme_renderer/clean.py
+++ b/readme_renderer/clean.py
@@ -30,7 +30,7 @@
     "br", "caption", "cite", "col", "colgroup", "dd", "del", "details", "div",
     "dl", "dt", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "img", "p", "pre",
     "span", "sub", "summary", "sup", "table", "tbody", "td", "th", "thead",
-    "tr", "tt", "kbd", "var", "input", "section", "aside", "nav",
+    "tr", "tt", "kbd", "var", "input", "section", "aside", "nav", "s",
 ]
 
 ALLOWED_ATTRIBUTES = {
diff --git a/tests/fixtures/test_rst_bibtex.html b/tests/fixtures/test_rst_bibtex.html
new file mode 100644
index 0000000..4305801
--- /dev/null
+++ b/tests/fixtures/test_rst_bibtex.html
@@ -0,0 +1,2 @@
+<pre><code><span class="nc">&#64;article</span><span class="p">{</span><span class="nl">the_impact_of_pygments_docutils_config_and_html5</span><span class="p">,</span><span class="w">
+  </span><span class="na">year</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><s>{2022}</s><span class="p">,</span></code></pre>
diff --git a/tests/fixtures/test_rst_bibtex.rst b/tests/fixtures/test_rst_bibtex.rst
new file mode 100644
index 0000000..a7642f4
--- /dev/null
+++ b/tests/fixtures/test_rst_bibtex.rst
@@ -0,0 +1,4 @@
+.. code:: bibtex
+
+   @article{the_impact_of_pygments_docutils_config_and_html5,
+     year = {2022},