diff --git a/2.3/alpine3.7/Dockerfile b/2.3/alpine3.7/Dockerfile
index 512a3c691c..2a9c19b2b6 100644
--- a/2.3/alpine3.7/Dockerfile
+++ b/2.3/alpine3.7/Dockerfile
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\
diff --git a/2.4/alpine3.6/Dockerfile b/2.4/alpine3.6/Dockerfile
index b8ec8f36af..8d611d8488 100644
--- a/2.4/alpine3.6/Dockerfile
+++ b/2.4/alpine3.6/Dockerfile
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\
diff --git a/2.4/alpine3.7/Dockerfile b/2.4/alpine3.7/Dockerfile
index f04fb896fe..fbfe011b25 100644
--- a/2.4/alpine3.7/Dockerfile
+++ b/2.4/alpine3.7/Dockerfile
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\
diff --git a/2.5/alpine3.7/Dockerfile b/2.5/alpine3.7/Dockerfile
index 7ef43e6db0..f7a9f4d977 100644
--- a/2.5/alpine3.7/Dockerfile
+++ b/2.5/alpine3.7/Dockerfile
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\
diff --git a/2.6-rc/alpine3.7/Dockerfile b/2.6-rc/alpine3.7/Dockerfile
index 7eaeff57e2..7599271967 100644
--- a/2.6-rc/alpine3.7/Dockerfile
+++ b/2.6-rc/alpine3.7/Dockerfile
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\
diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index 759a8dfa9e..15375cdfb1 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -81,14 +81,14 @@ RUN set -ex \
 			| sort -u \
 			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
 	)" \
-	&& apk add --virtual .ruby-rundeps $runDeps \
+	&& apk add --no-network --virtual .ruby-rundeps $runDeps \
 		bzip2 \
 		ca-certificates \
 		libffi-dev \
 		procps \
 		yaml-dev \
 		zlib-dev \
-	&& apk del .ruby-builddeps \
+	&& apk del --no-network .ruby-builddeps \
 	&& cd / \
 	&& rm -r /usr/src/ruby \
 	\