diff --git a/Dockerfile_alpine b/Dockerfile_alpine
index 4600f09..a61a717 100644
--- a/Dockerfile_alpine
+++ b/Dockerfile_alpine
@@ -13,8 +13,9 @@ ENV WEBSERVER_PORT=8080
 
 COPY start-container.sh /usr/local/bin/start-container
 
-RUN apk add --no-cache libcurl \
-    && docker-php-ext-install ctype curl dom fileinfo filter hash mbstring openssl pcre pdo session tokenizer xml \
+# preinstalled hash openssl pcre tokenizer
+RUN apk add --no-cache curl-dev libxml2-dev oniguruma-dev \
+    && docker-php-ext-install ctype curl dom fileinfo filter mbstring pdo session xml \
     && chmod +x /usr/local/bin/start-container \
     && echo "install composer" \
     && curl -o composer-setup.php https://getcomposer.org/installer \