diff --git a/Containers/mastercontainer/start.sh b/Containers/mastercontainer/start.sh
index 8ea80817..f215f6c6 100644
--- a/Containers/mastercontainer/start.sh
+++ b/Containers/mastercontainer/start.sh
@@ -76,7 +76,7 @@ if ! sudo -u www-data docker info &>/dev/null; then
     exit 1
 fi
 API_VERSION_FILE="$(find ./ -name DockerActionManager.php | head -1)"
-API_VERSION="$(grep -oP 'const API_VERSION.*\;' "$API_VERSION_FILE" | grep -oP '[0-9]+.[0-9]+' | head -1)"
+API_VERSION="$(grep -oP 'const string API_VERSION.*\;' "$API_VERSION_FILE" | grep -oP '[0-9]+.[0-9]+' | head -1)"
 # shellcheck disable=SC2001
 API_VERSION_NUMB="$(echo "$API_VERSION" | sed 's/\.//')"
 LOCAL_API_VERSION_NUMB="$(sudo -u www-data docker version | grep -i "api version" | grep -oP '[0-9]+.[0-9]+' | head -1 | sed 's/\.//')"