diff --git a/pkgs/development/coq-modules/math-classes/default.nix b/pkgs/development/coq-modules/math-classes/default.nix
index e61019b91c67..0a78191d8b72 100644
--- a/pkgs/development/coq-modules/math-classes/default.nix
+++ b/pkgs/development/coq-modules/math-classes/default.nix
@@ -4,10 +4,10 @@ with lib; mkCoqDerivation {
 
   pname = "math-classes";
   inherit version;
-  defaultVersion = if versions.range "8.11" "8.13" coq.coq-version then "8.13.0" else
-                   if versions.range "8.6"  "8.10" coq.coq-version then "8.12.0" else null;
+  defaultVersion = if versions.range "8.6" "8.15" coq.coq-version then "8.15.0" else null;
   release."8.12.0".sha256 = "14nd6a08zncrl5yg2gzk0xf4iinwq4hxnsgm4fyv07ydbkxfb425";
   release."8.13.0".sha256 = "1ln7ziivfbxzbdvlhbvyg3v30jgblncmwcsam6gg3d1zz6r7cbby";
+  release."8.15.0".sha256 = "10w1hm537k6jx8a8vghq1yx12rsa0sjk2ipv3scgir71ln30hllw";
 
   extraBuildInputs = [ bignums ];