diff --git a/CHANGELOG.md b/CHANGELOG.md
index 954d4091..2b044061 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] - 2022-10-21
+## [Unreleased] - 2022-10-24
 
 ### Added
 
@@ -19,6 +19,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### CI/CD
 
 ### Dependencies
+
+
+## [1.8.6] - 2022-10-24
+
+### Fixed
+* Some users may be using the action on a self-hosted runner not yet updated to a version supporting the
+  new GitHub Actions `GITHUB_OUTPUT` environment file. This patch adds backwards compatibility for those
+  users (e.g., it falls back to using the deprecated `set-output` if `GITHUB_OUTPUT` doesn't exist).
+
+### Dependencies
 * Bump cicirello/pyaction from 4.11.0 to 4.11.1
 
 
diff --git a/generatesitemap.py b/generatesitemap.py
index 71024b00..9318dcf7 100755
--- a/generatesitemap.py
+++ b/generatesitemap.py
@@ -299,6 +299,9 @@ def set_outputs(names_values) :
         with open(os.environ["GITHUB_OUTPUT"], "a") as f :
             for name, value in names_values.items() :
                 print("{0}={1}".format(name, value), file=f)
+    else : # Fall-back to deprecated set-output for non-updated runners
+        for name, value in names_values.items() :
+            print("::set-output name={0}::{1}".format(name, value))
 
 def main(
         websiteRoot,