diff --git a/md/contact/contact_web3forms.md b/md/contact/contact_web3forms.md
index 929f5df..d011123 100644
--- a/md/contact/contact_web3forms.md
+++ b/md/contact/contact_web3forms.md
@@ -27,6 +27,6 @@
     <textarea name="message" maxlength="1000" style="width: 500px; max-width: 90%; height: 250px;" required></textarea>
     <br>
     <br>
-    <button type="submit">[send]</button>
+    <button class="[class]" type="submit">[send]</button>
 
 </form>