diff --git a/docs/configuration.rst b/docs/configuration.rst
index 0752b9c9..b08aca09 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -713,8 +713,6 @@ extractor.derpibooru.filter
 Type
     ``integer``
 Default
-    ``null``
-Example
     ``56027`` (`Everything <https://derpibooru.org/filters/56027>`_ filter)
 Description
     The content filter ID to use.
diff --git a/gallery_dl/extractor/derpibooru.py b/gallery_dl/extractor/derpibooru.py
index 3b20fa54..5dbe2f0c 100644
--- a/gallery_dl/extractor/derpibooru.py
+++ b/gallery_dl/extractor/derpibooru.py
@@ -46,6 +46,8 @@ class DerpibooruExtractor(BooruExtractor):
         filter_id = self.config("filter")
         if filter_id:
             params["filter_id"] = filter_id
+        elif not api_key:
+            params["filter_id"] = "56027"  # "Everything" filter
 
         while True:
             data = self.request(url, params=params).json()