diff --git a/gromox-2.10.tar.asc b/gromox-2.10.tar.asc
deleted file mode 100644
index 3ee59a1..0000000
--- a/gromox-2.10.tar.asc
+++ /dev/null
@@ -1,7 +0,0 @@
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diff --git a/gromox-2.10.tar.zst b/gromox-2.10.tar.zst
deleted file mode 100644
index 61d43bd..0000000
--- a/gromox-2.10.tar.zst
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1c14e7129f1fccaef9a59f790be542a064e0edab9eb41ff83735582ef015486a
-size 2032004
diff --git a/gromox-2.11.tar.asc b/gromox-2.11.tar.asc
new file mode 100644
index 0000000..44c7259
--- /dev/null
+++ b/gromox-2.11.tar.asc
@@ -0,0 +1,7 @@
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diff --git a/gromox-2.11.tar.zst b/gromox-2.11.tar.zst
new file mode 100644
index 0000000..f16b608
--- /dev/null
+++ b/gromox-2.11.tar.zst
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:caa9c9e03aaf939ef86e2917b5aaa32f75e6bd855eba4bb8fae635c7b5a64d9a
+size 2041312
diff --git a/gromox.changes b/gromox.changes
index da55889..f522bda 100644
--- a/gromox.changes
+++ b/gromox.changes
@@ -1,3 +1,16 @@
+-------------------------------------------------------------------
+Mon Aug 21 13:40:35 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 2.11
+  * exmdb: attachment storage with hash-based filenames
+  * exmdb_local: persistent (on-disk) last-autoreply time tracking
+  * imap: allow large literals with APPEND
+  * imap: add RFC 7888 support
+  * oxdisco: allow AutoDiscover information retrieval from
+    secondary mailboxes even if the scndstore_hints table does not
+    have an entry.
+  * emsmdb: "Mark all as read" in OL (Online mode) now works
+
 -------------------------------------------------------------------
 Thu Jun 15 15:24:02 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/gromox.dsc b/gromox.dsc
index e76b5c8..cd578c7 100644
--- a/gromox.dsc
+++ b/gromox.dsc
@@ -1,7 +1,7 @@
 Format: 1.0
 Source: gromox
 Architecture: any
-Version: 2.9
+Version: 2.11
 DEBTRANSFORM-RELEASE: 1
 Maintainer: Gromox <null@gromox.com>
 Homepage: https://gromox.com
@@ -34,6 +34,7 @@ Build-Depends:
  libtool-bin (>= 2) | libtool (>= 2),
  libvmime-dev (>= 0.9.2),
  libxml2-dev,
+ libxxhash-dev,
  libzstd-dev,
  lsb-release,
  make,
diff --git a/gromox.spec b/gromox.spec
index 1cacf45..eeb57fd 100644
--- a/gromox.spec
+++ b/gromox.spec
@@ -19,7 +19,7 @@
 %define _libexecdir %_prefix/libexec
 
 Name:           gromox
-Version:        2.10
+Version:        2.11
 Release:        0
 Summary:        Groupware server backend with RPC, IMAP,POP3, PHP-MAPI support
 License:        AGPL-3.0-or-later AND GPL-2.0-only AND GPL-3.0-or-later
@@ -58,6 +58,7 @@ BuildRequires:  pkgconfig(libolecf)
 BuildRequires:  pkgconfig(libpff)
 BuildRequires:  pkgconfig(libssl)
 BuildRequires:  pkgconfig(libxml-2.0)
+BuildRequires:  pkgconfig(libxxhash)
 BuildRequires:  pkgconfig(libzstd)
 BuildRequires:  pkgconfig(sqlite3)
 BuildRequires:  pkgconfig(tinyxml2) >= 8
@@ -96,6 +97,7 @@ Requires(pre):  user(gromox)
 Requires(pre):  group(gromox)
 Provides:       php-mapi-gromox = %version-%release
 Provides:       bundled(tzcode) = 2022c
+Conflicts:      grommunio-admin-api < 1.10.7
 %{?systemd_ordering}
 %if !0%{?_pamdir:1}
 %define _pamdir /%_lib/security
@@ -160,7 +162,6 @@ cp -a "$b/usr/share/gromox/fpm-gromox.conf.sample" "$b/etc/php-fpm.d/gromox.conf
 %endif
 perl -i -lpe 's{Type=simple}{Type=simple\nRestart=on-failure}' "$b/%_unitdir"/*.service
 %fdupes %buildroot/%_prefix
-echo hi >%buildroot/usr/libexec/gromox/x.xml
 
 %global services gromox-delivery.service gromox-delivery-queue.service gromox-event.service gromox-http.service gromox-imap.service gromox-midb.service gromox-pop3.service gromox-snapshot.service gromox-snapshot.timer gromox-timer.service gromox-zcore.service