diff --git a/AUTHORS b/AUTHORS
index 165e9d07..66314770 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -54,6 +54,7 @@ Hiroshi Miura (miurahr@nttdata.co.jp)
 howardlee (lihongweibj@inspur.com)
 Hu Bing (hubingsh@cn.ibm.com)
 Ian Cordasco (ian.cordasco@rackspace.com)
+Ivan Kolodyazhny (e0ne@e0ne.info)
 jacky06 (zhang.min@99cloud.net)
 Jaivish Kothari (jaivish.kothari@nectechnologies.in)
 Jakub Krajcovic (jakub.krajcovic@gmail.com)
@@ -107,6 +108,7 @@ pengyuesheng (pengyuesheng@gohighsec.com)
 Pete Zaitcev (zaitcev@kotori.zaitcev.us)
 Peter Lisak (peter.lisak@firma.seznam.cz)
 Petr Kovar (pkovar@redhat.com)
+Pierre Riteau (pierre@stackhpc.com)
 Pradeep Kumar Singh (pradeep.singh@nectechnologies.in)
 Pratik Mallya (pratik.mallya@gmail.com)
 qingszhao (zhao.daqing@99cloud.net)
diff --git a/ChangeLog b/ChangeLog
index cecee2da..8d0b1e55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+3.9.1
+-----
+
+* Fixed capability endpoint discovery when there's a URL prefix for the
+  Swift endpoint, such as may be done with Ceph and radosgw.
+
 3.9.0
 -----
 
diff --git a/releasenotes/notes/3_9_1_release-ef242d7bedf3aa8b.yaml b/releasenotes/notes/3_9_1_release-ef242d7bedf3aa8b.yaml
new file mode 100644
index 00000000..e296b369
--- /dev/null
+++ b/releasenotes/notes/3_9_1_release-ef242d7bedf3aa8b.yaml
@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    Fixed discovery of activated capabilities against Ceph Object Gateway. It
+    prevented users from creating containers via Horizon. See bugs
+    `1712358 <https://bugs.launchpad.net/python-swiftclient/+bug/1712358>`__
+    and `1880188 <https://bugs.launchpad.net/horizon/+bug/1880188>`__ for more
+    details.