diff --git a/Dockerfile b/Dockerfile
index 79bf15f..43d1adb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,9 +7,9 @@ FROM ocurrent/opam@sha256:d30098ff92b5ee10cf7c11c17f2351705e5226a6b05aa8b9b7280b
 # Pin last known-good version for reproducible builds.
 # Remove this line (and the base image pin above) if you want to test with the
 # latest versions.
-RUN cd ~/opam-repository && git fetch origin master && git reset --hard 0cd6dafebfb49a3b56cce8e6651aa83c591214d5 && opam update
+RUN cd ~/opam-repository && git fetch origin master && git reset --hard e81ab2996896b21cba74c43a903b305a5a6341ef && opam update
 
-RUN opam depext -i -y mirage.3.7.7 lwt.5.3.0
+RUN opam depext -i -y mirage.3.8.0 lwt.5.3.0
 RUN mkdir /home/opam/qubes-mirage-firewall
 ADD config.ml /home/opam/qubes-mirage-firewall/config.ml
 WORKDIR /home/opam/qubes-mirage-firewall
diff --git a/Makefile.builder b/Makefile.builder
index f93d74c..37c5f43 100644
--- a/Makefile.builder
+++ b/Makefile.builder
@@ -4,5 +4,5 @@ SOURCE_BUILD_DEP := firewall-build-dep
 
 firewall-build-dep:
 	opam install -y depext
-	opam depext -i -y mirage.3.7.7 lwt.5.3.0
+	opam depext -i -y mirage.3.8.0 lwt.5.3.0
 
diff --git a/uplink.ml b/uplink.ml
index d4372b3..683f006 100644
--- a/uplink.ml
+++ b/uplink.ml
@@ -83,8 +83,8 @@ let connect config =
   Eth.connect net >>= fun eth ->
   Arp.connect eth >>= fun arp ->
   Arp.add_ip arp my_ip >>= fun () ->
-  let network = Ipaddr.V4.Prefix.make 0 Ipaddr.V4.any in
-  I.connect ~ip:(network, my_ip) ~gateway eth arp >>= fun ip ->
+  let cidr = Ipaddr.V4.Prefix.make 0 my_ip in
+  I.connect ~cidr ~gateway eth arp >>= fun ip ->
   U.connect ip >>= fun udp ->
   let netvm_mac =
     Arp.query arp gateway