diff --git a/files/assets/js/core.js b/files/assets/js/core.js
index 95f7569ef..47eee7321 100644
--- a/files/assets/js/core.js
+++ b/files/assets/js/core.js
@@ -283,6 +283,10 @@ function showmore() {
 		btn.innerHTML = 'SHOW LESS'
 }
 
+for (const element of document.getElementsByClassName('showmore')) {
+	element.onclick = showmore;
+}
+
 function formatDate(d) {
 	let year = d.getFullYear();
 	let monthAbbr = d.toLocaleDateString('en-us', {month: 'short'});
diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index 7da09e702..c3e378ec0 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -411,7 +411,7 @@ def sanitize(sanitized, golden=True, limit_pings=0, showmore=True, count_marseys
 		sanitized = sanitized.replace('\n','')
 
 	if showmore and len(sanitized) > 3500:
-		sanitized = showmore_regex.sub(r'\1<p><button class="showmore" data-nonce="{{g.nonce}}" data-onclick="showmore()">SHOW MORE</button></p><d class="d-none">\2</d>', sanitized, count=1)
+		sanitized = showmore_regex.sub(r'\1<p><button class="showmore" data-nonce="{{g.nonce}}">SHOW MORE</button></p><d class="d-none">\2</d>', sanitized, count=1)
 
 	return sanitized.strip()