diff --git a/0/debian/Dockerfile b/0/debian/Dockerfile
index 25d11639..451e8bb8 100644
--- a/0/debian/Dockerfile
+++ b/0/debian/Dockerfile
@@ -10,7 +10,7 @@ RUN set -x \
 	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
 	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
 	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
 	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
 	&& { command -v gpgconf && gpgconf --kill all || :; } \
 	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
diff --git a/1/debian/Dockerfile b/1/debian/Dockerfile
index ef078608..0051f460 100644
--- a/1/debian/Dockerfile
+++ b/1/debian/Dockerfile
@@ -8,7 +8,7 @@ RUN set -x \
 	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
 	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
 	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
 	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
 	&& { command -v gpgconf && gpgconf --kill all || :; } \
 	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
diff --git a/2/debian/Dockerfile b/2/debian/Dockerfile
index de675d2c..5f8f284c 100644
--- a/2/debian/Dockerfile
+++ b/2/debian/Dockerfile
@@ -8,7 +8,7 @@ RUN set -x \
 	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
 	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
 	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
 	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
 	&& { command -v gpgconf && gpgconf --kill all || :; } \
 	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \