diff --git a/inst/rmarkdown/templates/posterdown_ids/resources/template.html b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
index c848ef1..b2f094a 100644
--- a/inst/rmarkdown/templates/posterdown_ids/resources/template.html
+++ b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
@@ -1310,5 +1310,14 @@
 $include-after$
 $endfor$
 
+<script>
+// kableExtra::kable_styling(font_size = ...) adds an inline
+// "font-size: initial !important;" to table captions, which no stylesheet
+// rule can override. Strip it so the template's caption styling applies.
+document.querySelectorAll("table caption").forEach(function (el) {
+  el.style.removeProperty("font-size");
+});
+</script>
+
 </body>
 </html>