diff --git a/pkgs/tools/text/xml/basex/default.nix b/pkgs/tools/text/xml/basex/default.nix
index 4a7a478a12ac..0650270bb6a0 100644
--- a/pkgs/tools/text/xml/basex/default.nix
+++ b/pkgs/tools/text/xml/basex/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "basex-${version}";
-  version = "8.6.4";
+  version = "8.6.6";
 
   src = fetchurl {
-    url = "http://files.basex.org/releases/${version}/BaseX864.zip";
-    sha256 = "14320hfw53m0zl1v4377p0vcjvdnwfpa4gkj2y2wlrplma76y0w7";
+    url = "http://files.basex.org/releases/${version}/BaseX866.zip";
+    sha256 = "1kws6swisdaa17yhijjvkh2ikwz9rd5cw8mdjvkqw6vlcp1nq6m4";
   };
 
   buildInputs = [ unzip jre ];