diff --git a/readme.md b/readme.md
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--- a/readme.md
+++ b/readme.md
@@ -8,9 +8,18 @@ online.
 
 ## Build requirements
 
-- Go 1.12 or newer
+- Go 1.13 or newer
 - GNU Make
 
+### Older Go Versions
+
+You can install a newer version of Go alongside your OS's distribution by
+following the guide here: [https://golang.org/doc/install#extra_versions](https://golang.org/doc/install#extra_versions)
+
+Once you have that setup add an enviromnent variable named `GO_VERSION` and
+set it to the version you installed (eg, `1.14.1`).  The Makefile will now use
+the newer version.
+
 ## Install
 
 To just download and run: