diff --git a/alpine/Dockerfile_v5 b/alpine/Dockerfile_v5
index 4c756d5..055e97b 100644
--- a/alpine/Dockerfile_v5
+++ b/alpine/Dockerfile_v5
@@ -53,6 +53,7 @@ RUN set -eux; \
     libjpeg-turbo-dev \
     libpng-dev \
     libzip-dev \
+    libonig-dev \
     zip; \
     docker-php-ext-configure gd --with-freetype --with-jpeg; \
     docker-php-ext-install -j$(nproc) \