diff --git a/crates/api_common/src/tagline.rs b/crates/api_common/src/tagline.rs
index 88d5b64d3..40456277d 100644
--- a/crates/api_common/src/tagline.rs
+++ b/crates/api_common/src/tagline.rs
@@ -18,7 +18,7 @@ pub struct CreateTagline {
 /// Update a tagline
 pub struct UpdateTagline {
   pub id: TaglineId,
-  pub content: String,
+  pub content: Option<String>,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq, Hash)]
diff --git a/crates/api_crud/src/tagline/update.rs b/crates/api_crud/src/tagline/update.rs
index 7db5c3dc5..24475a24f 100644
--- a/crates/api_crud/src/tagline/update.rs
+++ b/crates/api_crud/src/tagline/update.rs
@@ -3,15 +3,18 @@ use actix_web::web::Json;
 use lemmy_api_common::{
   context::LemmyContext,
   tagline::{TaglineResponse, UpdateTagline},
-  utils::is_admin,
+  utils::{get_url_blocklist, is_admin, local_site_to_slur_regex, process_markdown_opt},
 };
 use lemmy_db_schema::{
-  source::tagline::{Tagline, TaglineUpdateForm},
+  source::{
+    local_site::LocalSite,
+    tagline::{Tagline, TaglineUpdateForm},
+  },
   traits::Crud,
   utils::naive_now,
 };
 use lemmy_db_views::structs::LocalUserView;
-use lemmy_utils::error::LemmyError;
+use lemmy_utils::{error::LemmyError, utils::validation::is_valid_body_field};
 
 #[tracing::instrument(skip(context))]
 pub async fn update_tagline(
@@ -22,8 +25,15 @@ pub async fn update_tagline(
   // Make sure user is an admin
   is_admin(&local_user_view)?;
 
+  let local_site = LocalSite::read(&mut context.pool()).await?;
+
+  let slur_regex = local_site_to_slur_regex(&local_site);
+  let url_blocklist = get_url_blocklist(&context).await?;
+  let content = process_markdown_opt(&data.content, &slur_regex, &url_blocklist, &context).await?;
+  is_valid_body_field(&content, false)?;
+
   let tagline_form = TaglineUpdateForm {
-    content: Some(data.content.to_string()),
+    content,
     updated: Some(Some(naive_now())),
   };