diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index 15d2c58e816c..43684c897302 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -22,11 +22,11 @@ let
   wrapperTool = if enableGTK3 then wrapGAppsHook else makeWrapper;
 in stdenv.mkDerivation rec {
   name = "thunderbird-${version}";
-  version = "52.8.0";
+  version = "52.9.0";
 
   src = fetchurl {
     url = "mirror://mozilla/thunderbird/releases/${version}/source/thunderbird-${version}.source.tar.xz";
-    sha512 = "ce44f32f44244560499c44dbe963a8296cf58cf33e3f26d07be455746ed7f77791084e41bc66b2c90fe46e97fa15ae2041b1f5fcfa94d15b45c4f90172230d03";
+    sha512 = "30jv4r8yh270dynqiwlc0yf52f6bka366l48rsppz5nqdb9jvxz04vghhcrp832wrmhd9z6r4b09yb1syhg7n3sl7zsjj2gq1yblhi1";
   };
 
   # New sed no longer tolerates this mistake.