diff --git a/server/src/services/analytic_service/analytic_service.rs b/server/src/services/analytic_service/analytic_service.rs
index aba5a6f..326dc18 100644
--- a/server/src/services/analytic_service/analytic_service.rs
+++ b/server/src/services/analytic_service/analytic_service.rs
@@ -274,9 +274,9 @@ impl AnalyticService {
     }
 
     fn patch_config(&mut self, patch: PatchConfig, tx: oneshot::Sender<()>) {
-        // TODO: update config in db
+        
         let (new_conf, need_learning, same_type) = self.analytic_unit_config.patch(patch);
-        self.analytic_unit_config = new_conf;
+        self.analytic_unit_config = new_conf.clone();
         if need_learning {
             self.consume_request(RequestType::RunLearning);
             // TODO: it's not fully correct: we need to wait when the learning starts
@@ -311,6 +311,13 @@ impl AnalyticService {
             }
         }
 
+        if same_type {
+            // TODO: avoid using `unwrap`
+            self.analytic_unit_service.update_active_config(&new_conf).unwrap();
+        } else {
+            // TODO: implement
+        }
+
         // TODO: save config depending on type
     }
 
diff --git a/server/src/services/analytic_unit_service.rs b/server/src/services/analytic_unit_service.rs
index 08444b2..036ee2f 100644
--- a/server/src/services/analytic_unit_service.rs
+++ b/server/src/services/analytic_unit_service.rs
@@ -127,7 +127,16 @@ impl AnalyticUnitService {
         }
     }
 
-    pub fn update_active_config() {
-        // TODO: implement
+    pub fn update_active_config(&self, cfg: &AnalyticUnitConfig) -> anyhow::Result<()> {
+        let conn = self.connection.lock().unwrap();
+
+        let cfg_json = serde_json::to_string(&cfg)?;
+
+        conn.execute(
+            "UPDATE analytic_unit SET config = ?1 WHERE active = TRUE",
+            params![cfg_json]
+        )?;
+
+        return Ok(());
     }
 }
\ No newline at end of file