diff --git a/README.md b/README.md
index dceea3a..b5e4c02 100644
--- a/README.md
+++ b/README.md
@@ -159,7 +159,7 @@ kubectl apply -f https://raw.githubusercontent.com/itzg/mc-router/master/docs/k8
 docker run -it --rm \
   -v gopkg:/go/pkg \
   -v ${PWD}:/build -w /build \
-  golang:1.12 \
+  golang:1.17.3 \
   go build ./cmd/mc-router
 ```