diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index 99dabaa..a0bc4bd 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,16 @@
+-------------------------------------------------------------------
+Tue Nov 28 22:07:44 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Thunderbird 115.5.1
+  Bugfix release
+  https://www.thunderbird.net/en-US/thunderbird/115.5.1/releasenotes
+  * Advanced GnuPG keys may be protected with an unexpected passphrase
+  * OpenPGP signatures rejected due to mismatched signature timestamp
+    now display signature timestamp and clarifying message
+  * Advanced address book search did not return results if display name
+    was left blank
+  * Clicking on attendee when inviting attendees added the attendee twice
+
 -------------------------------------------------------------------
 Wed Nov 22 06:28:54 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 1e2c9f5..44ea571 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -29,8 +29,8 @@
 # major 69
 # mainver %%major.99
 %define major          115
-%define mainver        %major.5.0
-%define orig_version   115.5.0
+%define mainver        %major.5.1
+%define orig_version   115.5.1
 %define orig_suffix    %nil
 %define update_channel release
 %define source_prefix  thunderbird-%{orig_version}
diff --git a/l10n-115.5.0.tar.xz b/l10n-115.5.1.tar.xz
similarity index 100%
rename from l10n-115.5.0.tar.xz
rename to l10n-115.5.1.tar.xz
diff --git a/tar_stamps b/tar_stamps
index 633f783..20f6a43 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="thunderbird"
 CHANNEL="esr115"
-VERSION="115.5.0"
+VERSION="115.5.1"
 VERSION_SUFFIX=""
-PREV_VERSION="115.4.3"
+PREV_VERSION="115.5.0"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/comm-esr115"
-RELEASE_TAG="e199b83e0bd27d612d3dc2673e7b2285e93c783c"
-RELEASE_TIMESTAMP="20231120220011"
+RELEASE_TAG="070cf9cc26acb6accc2d88a8118249a08c274c7e"
+RELEASE_TIMESTAMP="20231122164546"
diff --git a/thunderbird-115.5.0.source.tar.xz b/thunderbird-115.5.0.source.tar.xz
deleted file mode 100644
index 7eecbf2..0000000
--- a/thunderbird-115.5.0.source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:dc24886b2d2223d23141dbfb29855c0254de2603bd829d4cbc7dc4ea2ac711fa
-size 535406304
diff --git a/thunderbird-115.5.0.source.tar.xz.asc b/thunderbird-115.5.0.source.tar.xz.asc
deleted file mode 100644
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--- a/thunderbird-115.5.0.source.tar.xz.asc
+++ /dev/null
@@ -1,16 +0,0 @@
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new file mode 100644
index 0000000..16f8c5f
--- /dev/null
+++ b/thunderbird-115.5.1.source.tar.xz
@@ -0,0 +1,3 @@
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+size 532760764
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new file mode 100644
index 0000000..8fc9252
--- /dev/null
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