diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index 1aca35d56b19..26c9c873ea66 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
@@ -10,12 +10,12 @@ in
 rec {
   thunderbird = common rec {
     pname = "thunderbird";
-    version = "91.1.1";
+    version = "91.1.2";
     application = "comm/mail";
     binaryName = pname;
     src = fetchurl {
       url = "mirror://mozilla/thunderbird/releases/${version}/source/thunderbird-${version}.source.tar.xz";
-      sha512 = "2da102f9ec42489fc785ccdabcc7fdbc826f2df5e8e76c65866a44a221e762f59647ea265fe4907c18f0d3f1e04199e809235b4587ea17bdc1155e829f57ff2f";
+      sha512 = "f211ce2469f60862b1d641b5e165292d98db53695ab715090034c1ee2be7b04931f8e5e856b08b0c8c789e4d98df291d59283c257a38b556c0b4b0b63baa539f";
     };
     patches = [
     ];