diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index c0b9e72..c77deff 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,23 @@
+-------------------------------------------------------------------
+Tue Sep 26 07:15:31 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Thunderbird 115.3.0
+  https://www.thunderbird.net/en-US/thunderbird/115.3.0/releasenotes
+  MFSA 2023-43 (bsc#1215575)
+  * CVE-2023-5168 (bmo#1846683)
+    Out-of-bounds write in FilterNodeD2D1
+  * CVE-2023-5169 (bmo#1846685)
+    Out-of-bounds write in PathOps
+  * CVE-2023-5171 (bmo#1851599)
+    Use-after-free in Ion Compiler
+  * CVE-2023-5174 (bmo#1848454)
+    Double-free in process spawning on Windows
+  * CVE-2023-5176 (bmo#1836353, bmo#1842674, bmo#1843824,
+    bmo#1843962, bmo#1848890, bmo#1850180, bmo#1850983,
+    bmo#1851195)
+    Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3,
+    and Thunderbird 115.3
+
 -------------------------------------------------------------------
 Wed Sep 20 06:27:29 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 8692197..b2d2c18 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -29,8 +29,8 @@
 # major 69
 # mainver %%major.99
 %define major          115
-%define mainver        %major.2.3
-%define orig_version   115.2.3
+%define mainver        %major.3.0
+%define orig_version   115.3.0
 %define orig_suffix    %nil
 %define update_channel release
 %define source_prefix  thunderbird-%{orig_version}
diff --git a/l10n-115.2.3.tar.xz b/l10n-115.3.0.tar.xz
similarity index 100%
rename from l10n-115.2.3.tar.xz
rename to l10n-115.3.0.tar.xz
diff --git a/tar_stamps b/tar_stamps
index 0ef04b5..960cf76 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="thunderbird"
 CHANNEL="esr115"
-VERSION="115.2.3"
+VERSION="115.3.0"
 VERSION_SUFFIX=""
-PREV_VERSION="115.2.2"
+PREV_VERSION="115.2.3"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/comm-esr115"
-RELEASE_TAG="637b9308f926ec203608ab5e5da0de39311ec0c9"
-RELEASE_TIMESTAMP="20230919180656"
+RELEASE_TAG="1218aebde8d83fe28bbdfe39c63d7a10044829c2"
+RELEASE_TIMESTAMP="20230926115257"
diff --git a/thunderbird-115.2.3.source.tar.xz b/thunderbird-115.2.3.source.tar.xz
deleted file mode 100644
index 0266319..0000000
--- a/thunderbird-115.2.3.source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a158da0283b7f8de8d20cb2d71ad0c8abdf407507ba2b59b8a397f616955cdff
-size 532512216
diff --git a/thunderbird-115.2.3.source.tar.xz.asc b/thunderbird-115.2.3.source.tar.xz.asc
deleted file mode 100644
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+++ /dev/null
@@ -1,16 +0,0 @@
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diff --git a/thunderbird-115.3.0.source.tar.xz b/thunderbird-115.3.0.source.tar.xz
new file mode 100644
index 0000000..cf8eddc
--- /dev/null
+++ b/thunderbird-115.3.0.source.tar.xz
@@ -0,0 +1,3 @@
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+size 533553340
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new file mode 100644
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