diff --git a/.travis.yml b/.travis.yml
index 582c731..4d3435c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ env:
  - CABALVER=1.24 GHCVER=8.0.2
  - CABALVER=2.0 GHCVER=8.2.2
  - CABALVER=2.0 GHCVER=8.4.4
- - CABALVER=2.0 GHCVER=8.6.3
+ - CABALVER=2.0 GHCVER=8.6.5
 
 # Note: the distinction between `before_install` and `install` is not important.
 before_install: