diff --git a/pkgs/development/libraries/aqbanking/gwenhywfar.nix b/pkgs/development/libraries/aqbanking/gwenhywfar.nix
index 2eb67a022b82..e6b535ffe4cf 100644
--- a/pkgs/development/libraries/aqbanking/gwenhywfar.nix
+++ b/pkgs/development/libraries/aqbanking/gwenhywfar.nix
@@ -11,14 +11,14 @@
 }:
 
 let
-  inherit ((import ./sources.nix).gwenhywfar) sha256 releaseId version;
+  inherit ((import ./sources.nix).gwenhywfar) hash releaseId version;
 in stdenv.mkDerivation rec {
   pname = "gwenhywfar";
   inherit version;
 
   src = fetchurl {
     url = "https://www.aquamaniac.de/rdm/attachments/download/${releaseId}/${pname}-${version}.tar.gz";
-    inherit sha256;
+    inherit hash;
   };
 
   configureFlags = [
diff --git a/pkgs/development/libraries/aqbanking/sources.nix b/pkgs/development/libraries/aqbanking/sources.nix
index 4d95b09118af..2adea166da55 100644
--- a/pkgs/development/libraries/aqbanking/sources.nix
+++ b/pkgs/development/libraries/aqbanking/sources.nix
@@ -1,7 +1,10 @@
 {
-  gwenhywfar.version = "5.6.0";
-  gwenhywfar.sha256 = "1isbj4a7vdgagp3kkvx2pjcjy8lba6kzjr11fmr06aci1694dbsp";
-  gwenhywfar.releaseId = "364";
+  # https://www.aquamaniac.de/rdm/projects/gwenhywfar/files
+  gwenhywfar = {
+    version = "5.9.0";
+    hash = "sha256-6Ix9M4Ojy75Gyzsimfcd+55vpWX1oWaLQpc5HIdLDhI=";
+    releaseId = "415";
+  };
 
   # https://www.aquamaniac.de/rdm/projects/libchipcard/files
   libchipcard = {