diff --git a/Dockerfile b/Dockerfile
index 9116044..fd922d0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,6 @@ ARG SYNCTHING_RELEASE
 RUN \
  echo "**** install build packages ****" && \
  apk add --no-cache \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/community \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
 	curl \
 	g++ \
 	gcc \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index b1d30fe..c3117e8 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -6,8 +6,6 @@ ARG SYNCTHING_RELEASE
 RUN \
  echo "**** install build packages ****" && \
  apk add --no-cache \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/community \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
 	curl \
 	g++ \
 	gcc \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index b39141c..b31b738 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -6,8 +6,6 @@ ARG SYNCTHING_RELEASE
 RUN \
  echo "**** install build packages ****" && \
  apk add --no-cache \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/community \
-	--repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
 	curl \
 	g++ \
 	gcc \