diff --git a/README.md b/README.md
index 8113e92..600d422 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,16 @@
 # Dockerfiles
 
 This repository contains some Dockerfiles I use for various projects.
+
+## Using buildx
+
+First, install the required QEMU stuff:
+
+```sh
+docker run --privileged --rm tonistiigi/binfmt --install all
+```
+
+Afterwards, you can build stuff like this:
+```
+docker buildx build --platform linux/amd64,linux/arm64 .
+```
diff --git a/vlang/Dockerfile b/vlang/Dockerfile
index c2bbdec..358d736 100644
--- a/vlang/Dockerfile
+++ b/vlang/Dockerfile
@@ -2,9 +2,9 @@ FROM alpine:3.16
 
 ARG TARGETPLATFORM
 
-# Values for release 0.3
-ARG V_COMMIT_HASH=ec758604538c00cceb142d324609a241e665f7c7
-ARG VC_COMMIT_HASH=5dc8384638f515a098f75296fa7123c5e6a4964a
+# Values for release 0.3.1
+ARG V_COMMIT_HASH=f2f6ea596966ca405bd1be34b3bf3539b0c18fb7
+ARG VC_COMMIT_HASH=119e6752e94814715dbb926d438027a848d5be2c
 
 ENV VVV  /opt/vlang
 ENV PATH /opt/vlang:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin