diff --git a/config/search/config.json b/config/search/config.json
index f3d5ae4..78fe1ac 100644
--- a/config/search/config.json
+++ b/config/search/config.json
@@ -1,7 +1,7 @@
 {
   "automatic_index_updates": true,
   "persist_indexes": true,
-  "number_of_threads": 10,
+  "number_of_threads": 6,
   "eager_indexing_groups": [
     [{ "variables": [], "name": "acmidm-lezer" }],
     [{ "variables": [], "name": "acmidm-editeerder" }],
diff --git a/docker-compose.yml b/docker-compose.yml
index 848b6d3..dd4c91e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -159,7 +159,7 @@ services:
     restart: always
     logging: *default-logging
   frontend:
-    image: lblod/frontend-contact-hub:1.6.0
+    image: lblod/frontend-contact-hub:1.6.3
     volumes:
       - ./config/frontend/add-x-frame-options-header.conf:/config/add-x-frame-options.conf
     environment: