diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 683acfa23fe..5e19215657f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26799,7 +26799,7 @@ in
 
   thonny = callPackage ../applications/editors/thonny { };
 
-  thunderbird = thunderbird-78;
+  thunderbird = thunderbird-91;
 
   thunderbird-78 = callPackage ../applications/networking/mailreaders/thunderbird {
     # Using older Rust for workaround: