diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index 3cd5889b6fe5..fcf77335fd20 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
@@ -110,7 +110,7 @@ rec {
   };
 
   # Eventually, switch to an updateScript without versionPrefix hardcoded...
-  thunderbird-esr = thunderbird-128;
+  thunderbird-esr = thunderbird-140;
 
   thunderbird-140 = common {
     applicationName = "Thunderbird ESR";