diff --git a/pkgs/tools/misc/diffoscope/default.nix b/pkgs/tools/misc/diffoscope/default.nix
index c5ca89f54841..f49ded27dc0f 100644
--- a/pkgs/tools/misc/diffoscope/default.nix
+++ b/pkgs/tools/misc/diffoscope/default.nix
@@ -96,11 +96,11 @@ in
 # Note: when upgrading this package, please run the list-missing-tools.sh script as described below!
 python.pkgs.buildPythonApplication rec {
   pname = "diffoscope";
-  version = "265";
+  version = "266";
 
   src = fetchurl {
     url = "https://diffoscope.org/archive/diffoscope-${version}.tar.bz2";
-    hash = "sha256-YE81R8lTOM3wmv/GIaIBqUq2O6UvnUaHjuXZ00yDU8U=";
+    hash = "sha256-whEFBUFl8yFsZOtOWHbDm6Tx6i6UJYmQ5Fz7svLqGgs=";
   };
 
   outputs = [