Bump required golang version in the README (prometheus#3528)

10b2e8c pulled new TSDB, which uses `math/bits` package introduced in Go 1.9
liguozhong · Nov 30, 2017 · 9146760 · 9146760
1 parent 3619023
commit 9146760
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -56,7 +56,7 @@ Prometheus will now be reachable at http://localhost:9090/.
 ### Building from source
 
 To build Prometheus from the source code yourself you need to have a working
-Go environment with [version 1.8 or greater installed](http://golang.org/doc/install).
+Go environment with [version 1.9 or greater installed](http://golang.org/doc/install).
 
 You can directly use the `go` tool to download and install the `prometheus`
 and `promtool` binaries into your `GOPATH`: