diff --git a/README.md b/README.md
index 6b2af33..9970985 100644
--- a/README.md
+++ b/README.md
@@ -367,4 +367,16 @@ See Gitlab CI predefined variables [documentation](https://docs.gitlab.com/ee/ci
 
 ### Bitrise CI
 
-See Bitrise CI predefined variables [documentation](https://devcenter.bitrise.io/builds/available-environment-variables/)
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+See Bitrise CI predefined variables [documentation](https://devcenter.bitrise.io/builds/available-environment-variables/)
+
+### Other CI
+
+For [other CIs](https://docs.coveralls.io/supported-ci-services#insert-your-ci-here), the following default environment variables are supported:
+
+```
+CI_NAME
+CI_BUILD_NUMBER
+CI_BUILD_URL
+CI_BRANCH
+CI_PULL_REQUEST
+```
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