diff --git a/files/templates/submit_marseys.html b/files/templates/submit_marseys.html
index e27b2321b..53ce1d8e1 100644
--- a/files/templates/submit_marseys.html
+++ b/files/templates/submit_marseys.html
@@ -34,7 +34,7 @@
 							<input autocomplete="off" type="text" id="name" class="form-control" name="name" maxlength="30" pattern='[a-z0-9]{1,30}' required>
 
 							<label class="mt-3" for="author">Author</label>
-							<input autocomplete="off" type="text" id="author" class="form-control" name="author" value="{{v.username}}" maxlength="30"  pattern='[a-z0-9_\-]{3,30}' required>
+							<input autocomplete="off" type="text" id="author" class="form-control" name="author" value="{{v.username.lower()}}" maxlength="30"  pattern='[a-z0-9_\-]{3,30}' required>
 
 							<label class="mt-3" for="tags">Tags (must be separated by spaces)</label>
 							<input autocomplete="off" type="text" id="tags" class="form-control" name="tags" maxlength="200" pattern='[a-z0-9: ]{1,200}' required>