diff --git a/plume-common/src/utils.rs b/plume-common/src/utils.rs
index cae6504d..1128f6dc 100644
--- a/plume-common/src/utils.rs
+++ b/plume-common/src/utils.rs
@@ -287,7 +287,7 @@ pub fn md_to_html<'a>(
     media_processor: Option<MediaProcessor<'a>>,
 ) -> (String, HashSet<String>, HashSet<String>) {
     let base_url = if let Some(base_url) = base_url {
-        format!("//{}/", base_url)
+        format!("https://{}/", base_url)
     } else {
         "/".to_owned()
     };