diff --git a/calibre-plugin/plugin-defaults.ini b/calibre-plugin/plugin-defaults.ini
index c818b03d..af482e1c 100644
--- a/calibre-plugin/plugin-defaults.ini
+++ b/calibre-plugin/plugin-defaults.ini
@@ -3379,6 +3379,15 @@ slow_down_sleep_time:2
 ## than other XF2 sites.
 threadmarks_per_page:50
 
+## Using cloudscraper can satisfy the first couple levels of
+## Cloudflare bot-proofing, but not all levels.  Older versions of
+## OpenSSL will also raise problems, so versions of Calibre older than
+## v5 will probably fail.  Only a few sites are configured with
+## use_cloudscraper:true by default, but it can be applied in other
+## sites' ini sections.  user_agent setting is ignored when
+## use_cloudscraper:true
+use_cloudscraper:true
+
 [www.aneroticstory.com]
 use_basic_cache:true
 ## Some sites do not require a login, but do require the user to
diff --git a/fanficfare/defaults.ini b/fanficfare/defaults.ini
index 28a4de81..5e93e8e8 100644
--- a/fanficfare/defaults.ini
+++ b/fanficfare/defaults.ini
@@ -3372,6 +3372,15 @@ slow_down_sleep_time:2
 ## than other XF2 sites.
 threadmarks_per_page:50
 
+## Using cloudscraper can satisfy the first couple levels of
+## Cloudflare bot-proofing, but not all levels.  Older versions of
+## OpenSSL will also raise problems, so versions of Calibre older than
+## v5 will probably fail.  Only a few sites are configured with
+## use_cloudscraper:true by default, but it can be applied in other
+## sites' ini sections.  user_agent setting is ignored when
+## use_cloudscraper:true
+use_cloudscraper:true
+
 [www.aneroticstory.com]
 use_basic_cache:true
 ## Some sites do not require a login, but do require the user to