diff --git a/db/db-core/src/lib.rs b/db/db-core/src/lib.rs
index 2a84bcef..434ee86d 100644
--- a/db/db-core/src/lib.rs
+++ b/db/db-core/src/lib.rs
@@ -137,6 +137,13 @@ pub trait MCDatabase: std::marker::Send + std::marker::Sync + CloneSPDatabase {
     /// create new captcha
     async fn create_captcha(&self, username: &str, p: &CreateCaptcha) -> DBResult<()>;
 
+    /// update captcha metadata; doesn't change captcha key
+    async fn update_captcha_metadata(
+        &self,
+        username: &str,
+        p: &CreateCaptcha,
+    ) -> DBResult<()>;
+
     /// Add levels to captcha
     async fn add_captcha_levels(
         &self,
diff --git a/db/db-core/src/tests.rs b/db/db-core/src/tests.rs
index dcf45e21..761feb2f 100644
--- a/db/db-core/src/tests.rs
+++ b/db/db-core/src/tests.rs
@@ -142,6 +142,12 @@ pub async fn database_works<'a, T: MCDatabase>(
     // delete captcha levels
     db.delete_captcha_levels(p.username, c.key).await.unwrap();
 
+    // update captcha; set description = username and duration *= duration;
+    let mut c2 = c.clone();
+    c2.duration *= c2.duration;
+    c2.description = p.username;
+    db.update_captcha_metadata(p.username, &c2).await.unwrap();
+
     // delete captcha
     db.delete_captcha(p.username, c.key).await.unwrap();
     assert!(!db.captcha_exists(Some(p.username), c.key).await.unwrap());