diff --git a/pkgs/development/coq-modules/autosubst/default.nix b/pkgs/development/coq-modules/autosubst/default.nix
index de4aec6c13bafd0..7be4725255129bb 100644
--- a/pkgs/development/coq-modules/autosubst/default.nix
+++ b/pkgs/development/coq-modules/autosubst/default.nix
@@ -7,11 +7,13 @@ mkCoqDerivation {
 
   release."1.7".sha256 = "sha256-qoyteQ5W2Noxf12uACOVeHhPLvgmTzrvEo6Ts+FKTGI=";
   release."1.8".sha256 = "sha256-n0lD8D+tjqkDDjFiE4CggxczOPS5TkEnxpB3zEwWZ2I=";
+  release."1.9".sha256 = "sha256-XiLZjMc+1iwRGOstfLm/WQRF6FTdX6oJr5urn3wmLlA=";
 
   inherit version;
   defaultVersion = with lib.versions; lib.switch coq.coq-version [
-    { case = range "8.10" "8.13"; out = "1.7"; }
+    { case = range "8.14" "8.20"; out = "1.9"; }
     { case = range "8.14" "8.18"; out = "1.8"; }
+    { case = range "8.10" "8.13"; out = "1.7"; }
   ] null;
 
   propagatedBuildInputs = [ mathcomp-ssreflect ];