README : minimum required go version changed to 1.12
diff --git a/README.md b/README.md
index 286f82d..736c07f 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@
The `mcumgr` command line tool is available at:
https://github.com/apache/mynewt-mcumgr-cli. The command line tool requires [Go
-1.7 or later](https://golang.org/dl/). Once Go is installed and set up on your
+1.12 or later](https://golang.org/dl/). Once Go is installed and set up on your
system, you can install the mcumgr CLI tool by issuing the following `go get`
command:
