diff --git a/doc/configuration.txt b/doc/configuration.txt
index d25b729..ab49c68 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -9320,10 +9320,11 @@
                         rejected by the server. These requests are generally
                         considered to be safe to retry.
 
-      <status>          any HTTP status code among "404" (Not Found), "408"
-                        (Request Timeout), "425" (Too Early), "500" (Server
-                        Error), "501" (Not Implemented), "502" (Bad Gateway),
-                        "503" (Service Unavailable), "504" (Gateway Timeout).
+      <status>          any HTTP status code among "401" (Unauthorized), "403"
+                        (Forbidden), "404" (Not Found), "408" (Request Timeout),
+                        "425" (Too Early), "500" (Server Error), "501" (Not
+                        Implemented), "502" (Bad Gateway), "503" (Service
+                        Unavailable), "504" (Gateway Timeout).
 
       all-retryable-errors
                         retry request for any error that are considered