diff --git a/README.md b/README.md
index cd6f592..7b2bc1d 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ Please see [Coding gh-ost](doc/coding-ghost.md) for a guide to getting started d
 
 [Download latest release here](https://github.com/github/gh-ost/releases/latest)
 
-`gh-ost` is a Go project; it is built with Go `1.12` and above. To build on your own, use either:
+`gh-ost` is a Go project; it is built with Go `1.14` and above. To build on your own, use either:
 - [script/build](https://github.com/github/gh-ost/blob/master/script/build) - this is the same build script used by CI hence the authoritative; artifact is `./bin/gh-ost` binary.
 - [build.sh](https://github.com/github/gh-ost/blob/master/build.sh) for building `tar.gz` artifacts in `/tmp/gh-ost`
 
diff --git a/build.sh b/build.sh
index 98633cd..b5d4659 100755
--- a/build.sh
+++ b/build.sh
@@ -18,7 +18,7 @@ function build {
   GOOS=$3
   GOARCH=$4
 
-  if ! go version | egrep -q 'go(1\.1[23456])' ; then
+  if ! go version | egrep -q 'go(1\.1[456])' ; then
     echo "go version must be 1.14 or above"
     exit 1
   fi
diff --git a/script/ensure-go-installed b/script/ensure-go-installed
index 32ade46..98ccdc1 100755
--- a/script/ensure-go-installed
+++ b/script/ensure-go-installed
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 PREFERRED_GO_VERSION=go1.14.4
-SUPPORTED_GO_VERSIONS='go1.1[23456]'
+SUPPORTED_GO_VERSIONS='go1.1[456]'
 
 GO_PKG_DARWIN=${PREFERRED_GO_VERSION}.darwin-amd64.pkg
 GO_PKG_DARWIN_SHA=b518f21f823759ee30faddb1f623810a432499f050c9338777523d9c8551c62c