diff --git a/pkgs/development/libraries/aqbanking/gwenhywfar.nix b/pkgs/development/libraries/aqbanking/gwenhywfar.nix
index 061ed77849f..ee1fffdacdd 100644
--- a/pkgs/development/libraries/aqbanking/gwenhywfar.nix
+++ b/pkgs/development/libraries/aqbanking/gwenhywfar.nix
@@ -16,12 +16,8 @@ in stdenv.mkDerivation rec {
   pname = "gwenhywfar";
   inherit version;
 
-  src = let
-    qstring = "package=01&release=${releaseId}&file=02";
-    mkURLs = map (base: "${base}/sites/download/download.php?${qstring}");
-  in fetchurl {
-    name = "${pname}-${version}.tar.gz";
-    urls = mkURLs [ "http://www.aquamaniac.de" "http://www2.aquamaniac.de" ];
+  src = fetchurl {
+    url = "https://www.aquamaniac.de/rdm/attachments/download/${releaseId}/${pname}-${version}.tar.gz";
     inherit sha256;
   };
 
diff --git a/pkgs/development/libraries/aqbanking/sources.nix b/pkgs/development/libraries/aqbanking/sources.nix
index 884543d282a..9df21f2dedd 100644
--- a/pkgs/development/libraries/aqbanking/sources.nix
+++ b/pkgs/development/libraries/aqbanking/sources.nix
@@ -1,8 +1,7 @@
-# This file is autogenerated from update.sh in the same directory.
 {
-  gwenhywfar.version = "4.20.0";
-  gwenhywfar.sha256 = "1c0g3f8jk6j693774ifslx2ds4ksabgbbalhhm9gk20kpamxm22s";
-  gwenhywfar.releaseId = "208";
+  gwenhywfar.version = "5.1.3";
+  gwenhywfar.sha256 = "0xjr9d94y46h7pfdhz5ygn01pmlm66rhiybr520h13nvjh4zid0r";
+  gwenhywfar.releaseId = "242";
   libchipcard.version = "5.0.4";
   libchipcard.sha256 = "0fj2h39ll4kiv28ch8qgzdbdbnzs8gl812qnm660bw89rynpjnnj";
   libchipcard.releaseId = "200";
diff --git a/pkgs/development/libraries/aqbanking/update.sh b/pkgs/development/libraries/aqbanking/update.sh
deleted file mode 100755
index 8929e8bc6eb..00000000000
--- a/pkgs/development/libraries/aqbanking/update.sh
+++ /dev/null
@@ -1,92 +0,0 @@
-#!/bin/sh -e
-basedir="$(cd "$(dirname "$0")" && pwd)"
-
-getCurrentVersions() {
-    [ -e "$basedir/sources.nix" ] || return 0
-    (cd "$basedir" && nix-instantiate --eval --strict -E '
-    toString ((import ../../../../lib).mapAttrsToList
-        (name: info: "${name}:${info.version}!${info.sha256}!${info.releaseId}")
-        (import ./sources.nix))
-    ' | tr -d '"')
-}
-
-currentVersions="$(getCurrentVersions)"
-
-getLastestVersion() {
-    local baseurl="https://www.aquamaniac.de"
-    local pkglist="sites/download/packages.php?package=$1&showall=1"
-    local url="$baseurl/$pkglist"
-    local reVersion='[0-9]+(\.[0-9]+)+' # Only release versions, no betas!
-    local reHref='href=".*release=([0-9]+).*dummy=[^0-9]*('"$reVersion"')\.tar'
-    local reFull='s/^.*<a\>.*\<'"$reHref"'.*/\2!\1/p'
-    curl -s "$url" | sed -nre "$reFull" | sort -V -k 1,1 | tail -n1
-}
-
-getEntry() {
-    local name="$1"
-    for entry in $currentVersions; do
-        if [ "${entry%%:*}" = "$name" ]; then
-            echo "${entry#*:}"
-            return 0
-        fi
-    done
-    return 1
-}
-
-prefetchNew() {
-    local name="$1"
-    local version="$2"
-    local package="$3"
-    local releaseId="$4"
-
-    local url="http://www.aquamaniac.de/sites/download/download.php"
-    local qstring="package=$package&release=$releaseId&file=01";
-
-    nix-prefetch-url --name "$name-$version.tar.gz" "$url?$qstring"
-}
-
-processPackage() {
-    local name="$1"
-    local package="$2"
-
-    local latest="$(getLastestVersion "$package")"
-    local current="$(getEntry "$name")"
-    local currentTail="${current#*!}"
-
-    local currentVersion="${current%%!*}"
-    local currentSha256="${currentTail%%!*}"
-    local currentReleaseId="${current##*!}"
-
-    local latestVersion="${latest%%!*}"
-    local latestReleaseId="${latest##*!}"
-
-    if [ "$latestVersion" = "$currentVersion" -a \
-         "$latestReleaseId" = "$currentReleaseId" ]; then
-        echo "  $name.version = \"$currentVersion\";"
-        echo "  $name.sha256 = \"$currentSha256\";"
-        echo "  $name.releaseId = \"$currentReleaseId\";"
-        return 0
-    fi
-
-    local latestSha256="$(
-        prefetchNew "$name" "$latestVersion" "$package" "$latestReleaseId"
-    )"
-
-    echo "  $name.version = \"$latestVersion\";"
-    echo "  $name.sha256 = \"$latestSha256\";"
-    echo "  $name.releaseId = \"$latestReleaseId\";"
-    return 0
-}
-
-generateNewSources() {
-    echo "# This file is autogenerated from update.sh in the same directory."
-    echo "{"
-    for package in gwenhywfar:01 libchipcard:02 aqbanking:03; do
-        processPackage "${package%%:*}" "${package##*:}"
-    done
-    echo "}"
-}
-
-if newSources="$(generateNewSources)"; then
-    echo "$newSources" > "$basedir/sources.nix"
-fi