diff --git a/parser/.travis.yml b/parser/.travis.yml
index a640b6e..9e453f3 100644
--- a/parser/.travis.yml
+++ b/parser/.travis.yml
@@ -5,7 +5,7 @@ matrix:
     - rust: stable
     - rust: beta
     - rust: nightly
-    - rust: 1.28.0
+    - rust: 1.31.0
     - rust: nightly
       env: CLIPPY
       script: |