diff --git a/scripts/installer.sh b/scripts/installer.sh
index db029724f..9e48732da 100755
--- a/scripts/installer.sh
+++ b/scripts/installer.sh
@@ -14,7 +14,6 @@ readonly CLOUDRON_CONF=/home/yellowtent/configs/cloudron.conf
 readonly script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 readonly box_src_tmp_dir="$(realpath ${script_dir}/..)"
 readonly json="${script_dir}/../../node_modules/.bin/json"
-readonly curl="curl --fail --connect-timeout 20 --retry 10 --retry-delay 2 --max-time 300"
 
 readonly is_update=$([[ -f "${CLOUDRON_CONF}" ]] && echo "yes" || echo "no")
 
diff --git a/src/scripts/update.sh b/src/scripts/update.sh
index f6bafdc62..c5a8ae29c 100755
--- a/src/scripts/update.sh
+++ b/src/scripts/update.sh
@@ -9,6 +9,7 @@ fi
 
 readonly UPDATER_SERVICE="cloudron-updater"
 readonly DATA_FILE="/tmp/cloudron-update-data.json"
+readonly curl="curl --fail --connect-timeout 20 --retry 10 --retry-delay 2 --max-time 300"
 
 if [[ $# == 1 && "$1" == "--check" ]]; then
     echo "OK"
@@ -32,7 +33,7 @@ readonly installer_path="${box_src_tmp_dir}/scripts/installer.sh"
 echo "Downloading box code from ${sourceTarballUrl} to ${box_src_tmp_dir}"
 
 for try in `seq 1 10`; do
-    if curl -L "${sourceTarballUrl}" | tar -zxf - -C "${box_src_tmp_dir}"; then break; fi
+    if $curl -L "${sourceTarballUrl}" | tar -zxf - -C "${box_src_tmp_dir}"; then break; fi
     echo "Failed to download source tarball, trying again"
     sleep 5
 done