diff --git a/.travis.yml b/.travis.yml
index 75f33ec..2a7a530 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ rust:
   - stable
   - beta
   - nightly
-  - 1.28.0
+  - 1.31.0
 os:
   - linux
   - osx
diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index 2cfb649..4f30f9a 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -10,7 +10,8 @@
 
 - Upgrade to cimgui 1.66.2+ / imgui 1.66b. **This is a very big update, so there
   are a lot of breaking changes**
-- Bump minimum Rust version to 1.28 (required by the glutin crate)
+- Bump minimum Rust version to 1.31 (1.28 required by the glutin crate, and
+  1.31 requires by the stb_truetype crate)
 - Replaced `imgui-glutin-support` with `imgui-winit-support`
 
 ## [0.0.21] - 2018-10-11
diff --git a/README.markdown b/README.markdown
index 8ea6fd0..5ca6444 100644
--- a/README.markdown
+++ b/README.markdown
@@ -2,7 +2,7 @@
 
 **Still fairly experimental!**
 
-Minimum Rust version: 1.28
+Minimum Rust version: 1.31
 
 Wrapped Dear ImGui version: 1.66b