diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index 7324250..60bd7c5 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Sat Nov  4 15:34:08 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Thunderbird 115.4.2
+  https://www.thunderbird.net/en-US/thunderbird/115.4.2/releasenotes
+- build using rust/cargo 1.72 (1.69 about to be dropped from Factory)
+
 -------------------------------------------------------------------
 Tue Oct 24 20:52:32 UTC 2023 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 0ff5609..125e52c 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -29,8 +29,8 @@
 # major 69
 # mainver %%major.99
 %define major          115
-%define mainver        %major.4.1
-%define orig_version   115.4.1
+%define mainver        %major.4.2
+%define orig_version   115.4.2
 %define orig_suffix    %nil
 %define update_channel release
 %define source_prefix  thunderbird-%{orig_version}
@@ -96,8 +96,8 @@ BuildRequires:  gcc12-c++
 %else
 BuildRequires:  gcc-c++
 %endif
-BuildRequires:  cargo1.69
-BuildRequires:  rust1.69
+BuildRequires:  cargo1.72
+BuildRequires:  rust1.72
 %if 0%{useccache} != 0
 BuildRequires:  ccache
 %endif
diff --git a/l10n-115.4.1.tar.xz b/l10n-115.4.2.tar.xz
similarity index 100%
rename from l10n-115.4.1.tar.xz
rename to l10n-115.4.2.tar.xz
diff --git a/tar_stamps b/tar_stamps
index d5a45be..61203ce 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="thunderbird"
 CHANNEL="esr115"
-VERSION="115.4.1"
+VERSION="115.4.2"
 VERSION_SUFFIX=""
-PREV_VERSION="115.4.0"
+PREV_VERSION="115.4.1"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/comm-esr115"
-RELEASE_TAG="f9f6aede26e0991093e5935b0d85b1cb9de3c346"
-RELEASE_TIMESTAMP="20231024181440"
+RELEASE_TAG="713f0c8db2933f87d523d36e25fa733bea6694b3"
+RELEASE_TIMESTAMP="20231104124805"
diff --git a/thunderbird-115.4.1.source.tar.xz b/thunderbird-115.4.1.source.tar.xz
deleted file mode 100644
index 7ccaa35..0000000
--- a/thunderbird-115.4.1.source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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-oid sha256:9914bbcaf6d99dbaccdb5e4d32859bfbc725ab2e1f285b483fa141e411b47036
-size 537988108
diff --git a/thunderbird-115.4.1.source.tar.xz.asc b/thunderbird-115.4.1.source.tar.xz.asc
deleted file mode 100644
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+++ /dev/null
@@ -1,16 +0,0 @@
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new file mode 100644
index 0000000..ac9b8f5
--- /dev/null
+++ b/thunderbird-115.4.2.source.tar.xz
@@ -0,0 +1,3 @@
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+size 532064924
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new file mode 100644
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