diff --git a/alpine/Dockerfile_v5 b/alpine/Dockerfile_v5
index 9ba4fa3..3f43f77 100644
--- a/alpine/Dockerfile_v5
+++ b/alpine/Dockerfile_v5
@@ -9,6 +9,7 @@ RUN set -eux; \
     curl \
     mysql-client \
     git \
+    libonig-dev \
     libarchive-tools; \
     mkdir -p /var/www/app