diff --git a/Makefile b/Makefile
index 0f2da9cf..b7aec236 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,7 @@ $(TOOLS_ROOTFS) fs: $(TOOLS_DEB)
 	  --file fs/Dockerfile \
 	  . && \
 	bsdtar -cf rootfs.gnutar --format=gnutar @rootfs.tar && \
-	xgenext2fs -fzB 4096 -b 25600 -i 4096 -a rootfs.gnutar -L rootfs $(TOOLS_ROOTFS) && \
+	xgenext2fs -fzB 4096 -b 65536 -i 4096 -a rootfs.gnutar -L rootfs $(TOOLS_ROOTFS) && \
 	rm -f rootfs.gnutar rootfs.tar
 
 env:
diff --git a/fs/Dockerfile b/fs/Dockerfile
index b5e8f5d4..b40eee25 100644
--- a/fs/Dockerfile
+++ b/fs/Dockerfile
@@ -44,7 +44,7 @@ RUN apt-get update && \
         jq=1.6-2.1ubuntu3 \
         lua5.4=5.4.4-1 \
         lua-socket=3.0~rc1+git+ac3201d-6 \
-        xxd=2:8.2.3995-1ubuntu2.15 \
+        xxd=2:8.2.3995-1ubuntu2.16 \
         file=1:5.41-3ubuntu0.1 \
         /tmp/${TOOLS_DEB} \
         && \