diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index 0685e62..bef80ef 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Sat May 21 06:36:17 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Thunderbird 91.9.1
+  MFSA 2022-19 (bsc#1199768)
+  * CVE-2022-1802 (bmo#1770137)
+    Prototype pollution in Top-Level Await implementation
+  * CVE-2022-1529 (bmo#1770048)
+    Untrusted input used in JavaScript object indexing, leading
+    to prototype pollution
+
 -------------------------------------------------------------------
 Mon May  2 06:34:51 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 4c25eac..f05cd6f 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -29,8 +29,8 @@
 # major 69
 # mainver %major.99
 %define major          91
-%define mainver        %major.9.0
-%define orig_version   91.9.0
+%define mainver        %major.9.1
+%define orig_version   91.9.1
 %define orig_suffix    %{nil}
 %define update_channel release
 %define source_prefix  thunderbird-%{orig_version}
diff --git a/l10n-91.9.0.tar.xz b/l10n-91.9.1.tar.xz
similarity index 100%
rename from l10n-91.9.0.tar.xz
rename to l10n-91.9.1.tar.xz
diff --git a/tar_stamps b/tar_stamps
index 0fefe0d..7b2a9b0 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="thunderbird"
 CHANNEL="esr91"
-VERSION="91.9.0"
+VERSION="91.9.1"
 VERSION_SUFFIX=""
-PREV_VERSION="91.8.1"
+PREV_VERSION="91.9.0"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/comm-esr91"
-RELEASE_TAG="1576ef623c224f5ba915c39a06b519ea977685c0"
-RELEASE_TIMESTAMP="20220427203543"
+RELEASE_TAG="a52d41376d0374e23a0848e42a21454150c4d6a2"
+RELEASE_TIMESTAMP="20220520005021"
diff --git a/thunderbird-91.9.0.source.tar.xz b/thunderbird-91.9.0.source.tar.xz
deleted file mode 100644
index 2a1394e..0000000
--- a/thunderbird-91.9.0.source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:616e48327c4b0cdd2fd3c6385bfa4d380ba5cc7c52ce6014ae39d389a19fd092
-size 403847916
diff --git a/thunderbird-91.9.0.source.tar.xz.asc b/thunderbird-91.9.0.source.tar.xz.asc
deleted file mode 100644
index 7443574..0000000
--- a/thunderbird-91.9.0.source.tar.xz.asc
+++ /dev/null
@@ -1,16 +0,0 @@
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diff --git a/thunderbird-91.9.1.source.tar.xz b/thunderbird-91.9.1.source.tar.xz
new file mode 100644
index 0000000..b236d51
--- /dev/null
+++ b/thunderbird-91.9.1.source.tar.xz
@@ -0,0 +1,3 @@
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+oid sha256:d598f774c26b60d63bdd35535f88081b7f5897bfce6eb91ba8f9792141c492e6
+size 402851656
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new file mode 100644
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