diff --git a/Dockerfile b/Dockerfile
index 7142dae..f705397 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ env CGO_ENABLED=1
 arg TAG='v1.12.0-alpha'
 
 workdir /app
-run apk add git gcc musl-dev
+run apk add --no-cache git gcc musl-dev
 run git clone -b ${TAG} https://tangled.org/@tangled.org/core .
 run go build -o /usr/bin/knot -ldflags '-s -w -extldflags "-static"' ./cmd/knot
 
@@ -26,7 +26,7 @@ arg GID=1000
 copy rootfs .
 run chmod 755 /etc
 run chmod -R 755 /etc/s6-overlay
-run apk add shadow s6-overlay execline openssl openssh git curl bash
+run apk add --no-cache shadow s6-overlay execline openssl openssh git curl bash
 run groupadd -g $GID -f git
 run useradd -u $UID -g $GID -d /home/git git
 run openssl rand -hex 16 | passwd --stdin git