diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index 7099f526751d..34799f3898fa 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -73,13 +73,13 @@ assert waylandSupport -> gtk3Support == true;
 
 stdenv.mkDerivation rec {
   pname = "thunderbird";
-  version = "78.10.1";
+  version = "78.10.2";
 
   src = fetchurl {
     url =
       "mirror://mozilla/thunderbird/releases/${version}/source/thunderbird-${version}.source.tar.xz";
     sha512 =
-      "3dy8db83sw7kvv0pqqzrnidpa0s6j4vl32f08pgka68pgaldxbr9ay4m1amvjafykz4mpk161v35g4dzb1xf7sxdfl38621yayf9ypz";
+      "3sc6n3n9bqnsq9qn9myanvxpgdx20c803prla3p236hwidz7snmyp2097ggn42xp765km55n11drxalnslsxdypgjikbfdqal05hf5r";
   };
 
   nativeBuildInputs = [