diff --git a/.travis.yml b/.travis.yml
index 7bad4de..63023d7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ rust:
   - stable
   - beta
   - nightly
+  - 1.15.1
 os:
   - linux
   - osx
diff --git a/README.markdown b/README.markdown
index 147b2a8..93fda3a 100644
--- a/README.markdown
+++ b/README.markdown
@@ -2,6 +2,8 @@
 
 **Still fairly experimental!**
 
+Minimum Rust version: 1.15
+
 [![Build Status](https://travis-ci.org/Gekkio/imgui-rs.svg?branch=master)](https://travis-ci.org/Gekkio/imgui-rs)
 [![Latest release on crates.io](https://meritbadge.herokuapp.com/imgui)](https://crates.io/crates/imgui)