diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index 307a805ddf1e..e4da05046a9a 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
@@ -5,13 +5,13 @@ rec {
 
   thunderbird-115 = (buildMozillaMach rec {
     pname = "thunderbird";
-    version = "115.12.0";
+    version = "115.12.2";
     application = "comm/mail";
     applicationName = "Mozilla Thunderbird";
     binaryName = pname;
     src = fetchurl {
       url = "mirror://mozilla/thunderbird/releases/${version}/source/thunderbird-${version}.source.tar.xz";
-      sha512 = "d262ec2cea3fd003e66974b0bd8d61fb268ad2a233e54a6aea4803c5520e235ea308267f0484581ce235063c4fb90e621cdc1eea3f62212574b90427ede1c289";
+      sha512 = "182f35e8e5ece98d18dfefe106c73bc97fbc619f59772d9b3455b7c8af412021ecc5eae97a12515224e91deb814abb7a6ef7f538c450e9e77fdfd84078678038";
     };
     extraPatches = [
       # The file to be patched is different from firefox's `no-buildconfig-ffx90.patch`.