diff --git a/.travis.yml b/.travis.yml
index 01d4132..f03abe8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: rust
-rust: nightly-2018-08-01
+rust: nightly-2018-10-12
 
 addons:
   apt:
diff --git a/src/setup/README.md b/src/setup/README.md
index a0ff340..c896bab 100644
--- a/src/setup/README.md
+++ b/src/setup/README.md
@@ -27,7 +27,7 @@ any recent version should work but we have listed the version we have tested.
 
 - `arm-none-eabi-gdb`.
 
-- `minicom` on Linux and macOS. Tested version: 2.7. 
+- `minicom` on Linux and macOS. Tested version: 2.7.
   Readers report that `picocom` also works but we'll use `minicom` in this book.
 
 - `PuTTY` on Windows.
@@ -44,12 +44,12 @@ Then, install or switch to the nightly channel.
 $ rustup default nightly
 ```
 
-**NOTE** Make sure you have a nightly newer than `nightly-2018-06-22`.
+**NOTE** Make sure you have a nightly newer than `nightly-2018-10-12`.
 `rustc -V` should return a date newer than the one shown below:
 
 ``` shell
 $ rustc -V
-rustc 1.28.0-nightly (056f589fb 2018-06-22)
+rustc 1.31.0-nightly (2c2e2c57d 2018-10-12)
 ```
 
 ### OS specific instructions