diff --git a/.travis.yml b/.travis.yml
index c8e31367e5..f5013ec4c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,11 @@
-matrix:
+os: linux
+dist: focal
+language: shell
+
+jobs:
   include:
     - language: node_js
-      node_js:
-        - "10"
+      node_js: 10
       cache:
         directories:
         - node_modules # NPM packages
@@ -11,7 +14,8 @@ matrix:
       script:
         - remark src/*.md src/*/*.md --frail
     - language: python
-      python: 3.7
+      python: 3.9
+      cache: pip
       install:
         - pip install yamllint
       script:
diff --git a/.yamllint.yml b/.yamllint.yml
new file mode 100644
index 0000000000..0f8ac567ec
--- /dev/null
+++ b/.yamllint.yml
@@ -0,0 +1,5 @@
+extends: default
+
+rules:
+  line-length:
+    max: 99
diff --git a/tools/.gitignore b/tools/.gitignore
new file mode 100644
index 0000000000..bee8a64b79
--- /dev/null
+++ b/tools/.gitignore
@@ -0,0 +1 @@
+__pycache__