diff --git a/src/db.rs b/src/db.rs
index a87fbc8d..5ab8bed7 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -341,8 +341,22 @@ fn fix_entities() -> AppResult<()> {
 use super::_entities::{module}::{{ActiveModel, Entity}};
 pub type {module_pascal} = Entity;
 
+#[async_trait::async_trait]
 impl ActiveModelBehavior for ActiveModel {{
     // extend activemodel below (keep comment for generators)
+
+    async fn before_save<C>(self, _db: &C, insert: bool) -> std::result::Result<Self, DbErr>
+    where
+        C: ConnectionTrait,
+    {{
+        if !insert && self.updated_at.is_unchanged() {{
+            let mut this = self;
+            this.updated_at = sea_orm::ActiveValue::Set(chrono::Utc::now().into());
+            Ok(this)
+        }} else {{
+            Ok(self)
+        }}
+    }}
 }}
 "
                 ),