diff --git a/.github/workflows/updater.sh b/.github/workflows/updater.sh
index 72eb5cb..9fd3141 100755
--- a/.github/workflows/updater.sh
+++ b/.github/workflows/updater.sh
@@ -1,55 +1,74 @@
 #!/bin/bash
 
-#=================================================
-# PACKAGE UPDATING HELPER
-#=================================================
-
-# This script is meant to be run by GitHub Actions
-# The YunoHost-Apps organisation offers a template Action to run this script periodically
-# Since each app is different, maintainers can adapt its contents so as to perform
-# automatic actions when a new upstream release is detected.
-
-# Remove this exit command when you are ready to run this Action
-exit 1
-
 #=================================================
 # FETCHING LATEST RELEASE AND ITS ASSETS
 #=================================================
 
 # Fetching information
-current_version=$(cat manifest.json | jq -j '.version|split("~")[0]')
+current_version=$(cat manifest.json | jq -j '.upstream.version|split("~")[0]')
+current_yunohost_package_version=$(cat manifest.json | jq -j '.version|split("~ynh")[1]')
 repo=$(cat manifest.json | jq -j '.upstream.code|split("https://github.com/")[1]')
 # Some jq magic is needed, because the latest upstream release is not always the latest version (e.g. security patches for older versions)
 version=$(curl --silent "https://api.github.com/repos/$repo/releases" | jq -r '.[] | select( .prerelease != true ) | .tag_name' | sort -V | tail -1)
 assets=($(curl --silent "https://api.github.com/repos/$repo/releases" | jq -r '[ .[] | select(.tag_name=="'$version'").assets[].browser_download_url ] | join(" ") | @sh' | tr -d "'"))
 
+#fetching info for kepubify
+current_version_kepubify=$(sed -n '1p' ./conf/appkepubify.src.default | sed 's/^SOURCE_URL=https:\/\/github.com\/pgaskin\/kepubify\/releases\/download\/v//;s/\/kepubify-linux-__MACH__//'
+4.0.4)
+repo_kepubify="pgaskin/kepubify"
+version_kepubify=$(curl --silent "https://api.github.com/repos/$repo_kepubify/releases" | jq -r '.[] | select( .prerelease != true ) | .tag_name' | sort -V | tail -1)
+assets_kepubify=($(curl --silent "https://api.github.com/repos/$repo_kepubify/releases" | jq -r '[ .[] | select(.tag_name=="'$version_kepubify'").assets[].browser_download_url ] | join(" ") | @sh' | tr -d "'"))
+
 # Later down the script, we assume the version has only digits and dots
 # Sometimes the release name starts with a "v", so let's filter it out.
 # You may need more tweaks here if the upstream repository has different naming conventions. 
 if [[ ${version:0:1} == "v" || ${version:0:1} == "V" ]]; then
     version=${version:1}
 fi
+if [[ ${version_kepubify:0:1} == "v" || ${version_kepubify:0:1} == "V" ]]; then
+    version_kepubify=${version_kepubify:1}
+fi
 
 # Setting up the environment variables
 echo "Current version: $current_version"
 echo "Latest release from upstream: $version"
 echo "VERSION=$version" >> $GITHUB_ENV
 echo "REPO=$repo" >> $GITHUB_ENV
+echo "Current version for kepubify: $current_version_kepubify"
+echo "Latest release from upstream for kepubify: $version_kepubify"
+echo "VERSION=$version" >> $GITHUB_ENV
+echo "REPO=$repo" >> $GITHUB_ENV
 # For the time being, let's assume the script will fail
 echo "PROCEED=false" >> $GITHUB_ENV
 
 # Proceed only if the retrieved version is greater than the current one
+update_upstream=1
+update_kepubify=1
 if ! dpkg --compare-versions "$current_version" "lt" "$version" ; then
-    echo "::warning ::No new version available"
-    exit 0
+    echo "::warning ::No new version available for upstream app"
+    update_upstream=0
 # Proceed only if a PR for this new version does not already exist
 elif git ls-remote -q --exit-code --heads https://github.com/$GITHUB_REPOSITORY.git ci-auto-update-v$version ; then
     echo "::warning ::A branch already exists for this update"
+    update_upstream=0
+fi
+
+if ! dpkg --compare-versions "$current_version_kepubify" "lt" "$version_kepubify" ; then
+    echo "::warning ::No new version available for kepubify"
+    update_kepubify=0
+# Proceed only if a PR for this new version does not already exist
+elif git ls-remote -q --exit-code --heads https://github.com/$GITHUB_REPOSITORY.git ci-update-kepubify-v$version_kepubify ; then
+    echo "::warning ::A branch already exists for this kepubify update"
+    update_kepubify=0
+fi
+
+if [ "$update_kepubify"=0 ] && [ "$update_upstream"=0 ]; then
     exit 0
 fi
 
-# Each release can hold multiple assets (e.g. binaries for different architectures, source code, etc.)
-echo "${#assets[@]} available asset(s)"
+if [ "$update_upstream"=1 ]; then
+    # Each release can hold multiple assets (e.g. binaries for different architectures, source code, etc.)
+    echo "${#assets[@]} available asset(s)"
 
 #=================================================
 # UPDATE SOURCE FILES
@@ -59,78 +78,130 @@ echo "${#assets[@]} available asset(s)"
 # Here is an example for Grav, it has to be adapted in accordance with how the upstream releases look like.
 
 # Let's loop over the array of assets URLs
-for asset_url in ${assets[@]}; do
+    for asset_url in ${assets[@]}; do
 
-echo "Handling asset at $asset_url"
+        echo "Handling asset at $asset_url"
 
 # Assign the asset to a source file in conf/ directory
 # Here we base the source file name upon a unique keyword in the assets url (admin vs. update)
 # Leave $src empty to ignore the asset
-case $asset_url in
-  *"admin"*)
-    src="app"
-    ;;
-  *"update"*)
-    src="app-upgrade"
-    ;;
-  *)
-    src=""
-    ;;
-esac
+        case $asset_url in
+          *"calibre-web-$version.zip"*)
+            src="app"
+            ;;
+          *)
+            src=""
+            ;;
+        esac
 
 # If $src is not empty, let's process the asset
-if [ ! -z "$src" ]; then
+        if [ ! -z "$src" ]; then
 
 # Create the temporary directory
-tempdir="$(mktemp -d)"
+            tempdir="$(mktemp -d)"
 
 # Download sources and calculate checksum
-filename=${asset_url##*/}
-curl --silent -4 -L $asset_url -o "$tempdir/$filename"
-checksum=$(sha256sum "$tempdir/$filename" | head -c 64)
+            filename=${asset_url##*/}
+            curl --silent -4 -L $asset_url -o "$tempdir/$filename"
+            checksum=$(sha256sum "$tempdir/$filename" | head -c 64)
 
 # Delete temporary directory
-rm -rf $tempdir
-
-# Get extension
-if [[ $filename == *.tar.gz ]]; then
-  extension=tar.gz
-else
-  extension=${filename##*.}
-fi
+            rm -rf $tempdir
 
+            extension=zip
 # Rewrite source file
+
 cat <<EOT > conf/$src.src
 SOURCE_URL=$asset_url
 SOURCE_SUM=$checksum
-SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=$extension
-SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=
 EOT
-echo "... conf/$src.src updated"
+            echo "... conf/$src.src updated"
+
+        else
+            echo "... asset ignored"
+        fi
+
+    done
+
+if [ "$update_kepubify"=1 ]; then
+    for asset_url_kepubify in ${assets_kepubify[@]}; do
+
+        echo "Handling asset at $asset_url_kepubify"
+
+        case $asset_url_kepubify in
+          *"linux-32bit"*)
+            sha="sha256_32bit"
+            src="appkepubify"
+            ;;
+          *"linux-64bit"*)
+            sha="sha256_64bit"
+            src="appkepubify"
+            ;;
+          *"linux-arm"*)
+            sha="sha256_arm"
+            src="appkepubify"
+            ;;
+          *"linux-arm64"*)
+            sha="sha256_arm64"
+            src="appkepubify"
+            ;;
+          *"linux-armv6"*)
+            sha="sha256_armv6"
+            src="appkepubify"
+            ;;
+          *)
+            src=""
+            ;;
+        esac
+
+# If $src is not empty, let's process the asset
+        if [ ! -z "$src" ]; then
+
+# Create the temporary directory
+            tempdir="$(mktemp -d)"
+
+# Download sources and calculate checksum
+            filename=${asset_url##*/}
+            curl --silent -4 -L $asset_url -o "$tempdir/$filename"
+            checksum=$(sha256sum "$tempdir/$filename" | head -c 64)
+
+# Delete temporary directory
+            rm -rf $tempdir
+# Rewrite source file
+
+cat <<EOT > conf/$src.src.default
+SOURCE_URL=https://github.com/pgaskin/kepubify/releases/download/v$version_kepubify/kepubify-linux-__MACH__
+SOURCE_SUM=__SHA256__
+SOURCE_EXTRACT=false
+SOURCE_FILENAME=kepubify-linux-__MACH__
+EOT
+            echo "... conf/$src.src updated"
+#rewrite sha256sum
+            sed -i 's/^$sha=.*/$sha=$checksum/' ./scripts/_common.sh
+            echo "... ./scripts/_common.sh updated for $sha"
+        else
+            echo "... asset ignored"
+        fi
+
+    done
+
+
 
-else
-echo "... asset ignored"
 fi
 
-done
-
-#=================================================
-# SPECIFIC UPDATE STEPS
-#=================================================
-
-# Any action on the app's source code can be done.
-# The GitHub Action workflow takes care of committing all changes after this script ends.
-
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
-
+if [ "$update_upstream"=1 ]; then
 # Replace new version in manifest
-echo "$(jq -s --indent 4 ".[] | .version = \"$version~ynh1\"" manifest.json)" > manifest.json
-
-# No need to update the README, yunohost-bot takes care of it
+    echo "$(jq -s --indent 4 ".[] | .version = \"$version~ynh1\"" manifest.json)" > manifest.json
+    echo "$(jq -s --indent 4 ".[] | .upstream.version = \"$version\"" manifest.json)" > manifest.json
+fi
+if [ "$update_kepubify"=1 ] && [ "$update_upstream"=0 ]; then
+new_yunohost_package_version=$(("$current_yunohost_package_version+1"))
+    echo "$(jq -s --indent 4 ".[] | .version = \"$version~ynh$new_yunohost_package_version\"" manifest.json)" > manifest.json
+fi
 
 # The Action will proceed only if the PROCEED environment variable is set to true
 echo "PROCEED=true" >> $GITHUB_ENV