diff --git a/php7.4/dockerfile b/php7.4/dockerfile
index 881df6b..da919b3 100644
--- a/php7.4/dockerfile
+++ b/php7.4/dockerfile
@@ -12,7 +12,6 @@ RUN apk add --no-cache --virtual .build-deps \
         libxml2-dev \
         postgresql-dev \
         sqlite-dev \
-        libonig-dev \
     && apk add --no-cache \
         curl \
         git \
@@ -27,7 +26,6 @@ RUN apk add --no-cache --virtual .build-deps \
     && docker-php-ext-install \
         curl \
         iconv \
-        mbstring \
         pdo \
         pdo_mysql \
         pdo_pgsql \