diff --git a/docker/initial-data.json b/docker/initial-data.json
index 5e41638f8..396eaecec 100644
--- a/docker/initial-data.json
+++ b/docker/initial-data.json
@@ -112,7 +112,7 @@
         "conference_stream_poster_url": "",
         "conference_open_microphone": true,
         "conference_open_video": true,
-        "conference_auto_connect_next_speakers": true,
+        "conference_auto_connect_next_speakers": 0,
 
         "projector_countdown_default_time": 60,
         "projector_countdown_warning_time": 0,
diff --git a/docs/datavalidator/check_json.py b/docs/datavalidator/check_json.py
index 1c221982d..94addc294 100644
--- a/docs/datavalidator/check_json.py
+++ b/docs/datavalidator/check_json.py
@@ -50,11 +50,11 @@ def check_color(value: Any) -> bool:
 
 
 def check_number(value: Any) -> bool:
-    return value is None or isinstance(value, int)
+    return value is None or type(value) == int
 
 
 def check_float(value: Any) -> bool:
-    return value is None or isinstance(value, int) or isinstance(value, float)
+    return value is None or type(value) in (int, float)
 
 
 def check_boolean(value: Any) -> bool:
diff --git a/docs/example-data.json b/docs/example-data.json
index e1161c37e..d1bc9d0ab 100644
--- a/docs/example-data.json
+++ b/docs/example-data.json
@@ -248,7 +248,7 @@
         "conference_stream_poster_url": "",
         "conference_open_microphone": true,
         "conference_open_video": true,
-        "conference_auto_connect_next_speakers": true,
+        "conference_auto_connect_next_speakers": 0,
 
         "jitsi_room_name": "",
         "jitsi_domain": "",