diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index 1f94b3eb977c..fe54bb1eca26 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 = "91.0";
+    version = "91.0.1";
     application = "comm/mail";
     binaryName = pname;
     src = fetchurl {
       url = "mirror://mozilla/thunderbird/releases/${version}/source/thunderbird-${version}.source.tar.xz";
-      sha512 = "f3fcaff97b37ef41850895e44fbd2f42b0f1cb982542861bef89ef7ee606c6332296d61f666106be9455078933a2844c46bf243b71cc4364d9ff457d9c808a7a";
+      sha512 = "54e1f3233c544cf28302496512aaf2a5fb5486aab070680e82cefbdd1d12a33867c638ced61e43958bae47e40ff551592a2cf4d537f98c22ed1df31c5d5bb09c";
     };
     patches = [
       ./no-buildconfig-90.patch