diff --git a/.travis.yml b/.travis.yml
index 37c677d3..4a057210 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,16 +4,14 @@ rvm:
   - &latest_ruby 2.7
   - 2.5
 env:
-  global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
   matrix:
-    - JEKYLL_VERSION="~> 3.8"
+    - JEKYLL_VERSION="~> 3.9"
 matrix:
   include:
     - rvm: *latest_ruby
-      env: JEKYLL_VERSION="~> 3.8.5"
+      env: JEKYLL_VERSION="~> 3.9"
     - rvm: *latest_ruby
-      env: JEKYLL_VERSION="~> 4.0"
+      env: JEKYLL_VERSION="~> 4.2"
 before_install:
 - gem update --system
 before_script: bundle update