diff --git a/pkgs/development/interpreters/gnu-apl/default.nix b/pkgs/development/interpreters/gnu-apl/default.nix
index 883f3df647ef..d854643bb2fe 100644
--- a/pkgs/development/interpreters/gnu-apl/default.nix
+++ b/pkgs/development/interpreters/gnu-apl/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "gnu-apl";
-  version = "1.8";
+  version = "1.9";
 
   src = fetchurl {
     url = "mirror://gnu/apl/apl-${version}.tar.gz";
-    sha256 = "1jxvv2h3y1am1fw6r5sn3say1n0dj8shmscbybl0qhqdia2lqkql";
+    sha256 = "sha256-KRhn8bGTdpOrtXvn2aN2GLA3bj4nCVdIVKe75Suyjrg=";
   };
 
   buildInputs = [ readline gettext ncurses ];