diff --git a/CHANGELOG.md b/CHANGELOG.md
index cda8699..a9592af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Re-fetch object if `attributedTo` value doesn't match `actor` of `Create` activity.
 - Added actor validation to `Update(Note)` and `Undo(Follow)` handlers.
 
+### Fixed
+
+- Fixed database query error in `Create` activity handler.
+
 ## [1.20.0] - 2023-03-07
 
 ### Added
diff --git a/mitra-models/src/relationships/queries.rs b/mitra-models/src/relationships/queries.rs
index b82d935..f72cac5 100644
--- a/mitra-models/src/relationships/queries.rs
+++ b/mitra-models/src/relationships/queries.rs
@@ -360,6 +360,7 @@ pub async fn has_local_followers(
         WHERE
             actor_profile.actor_id = $1
             AND relationship_type = $2
+        LIMIT 1
         ",
         &[&actor_id, &RelationshipType::Follow]
     ).await?;
diff --git a/mitra-models/src/users/queries.rs b/mitra-models/src/users/queries.rs
index 6227a39..7047a59 100644
--- a/mitra-models/src/users/queries.rs
+++ b/mitra-models/src/users/queries.rs
@@ -92,6 +92,7 @@ pub async fn create_user(
         SELECT 1
         FROM user_account JOIN actor_profile USING (id)
         WHERE actor_profile.username ILIKE $1
+        LIMIT 1
         ",
         &[&user_data.username],
     ).await?;