diff --git a/.travis.yml b/.travis.yml
index db4160f2..25ffa167 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ matrix:
     - rust: nightly
   fast_finish: true
 before_script:
-  - rustup toolchain install nightly
+  - rustup toolchain install nightly-2018-06-18
   - rustup component add rustfmt-preview --toolchain nightly
   - command -v rustfmt || cargo install --force rustfmt-nightly
 script: