diff --git a/circleci/Dockerfile b/circleci/Dockerfile
index fe5f4e8..e600225 100644
--- a/circleci/Dockerfile
+++ b/circleci/Dockerfile
@@ -13,7 +13,8 @@ USER root
 
 RUN apk --update --no-cache add \
   php${PHP_VERSION}-fpm \
-  openssh-client
+  openssh-client \
+  findutils
 
 COPY fpm/conf.d/50_fpm.ini /etc/php/conf.d/50_fpm.ini
 COPY fpm/php-fpm.conf /etc/php/php-fpm.conf
diff --git a/dev/Dockerfile b/dev/Dockerfile
index 9ce8bb8..e0dcc72 100644
--- a/dev/Dockerfile
+++ b/dev/Dockerfile
@@ -8,7 +8,8 @@ USER root
 
 RUN apk --update --no-cache add \
       php${PHP_VERSION}-xdebug \
-      php${PHP_VERSION}-spx
+      php${PHP_VERSION}-spx \
+      findutils
 
 # https://blog.blackfire.io/alpine-linux-support.html
 RUN curl -sSL -A "Docker" -o /tmp/blackfire-probe.tar.gz -D - -L -s https://blackfire.io/api/v1/releases/probe/php/alpine/${ARCH}/${PHP_VERSION//./} && \