diff --git a/lib/appenders/index.js b/lib/appenders/index.js
index 3e26c12..aa81599 100644
--- a/lib/appenders/index.js
+++ b/lib/appenders/index.js
@@ -22,10 +22,18 @@ coreAppenders.set('tcp', require('./tcp'));
 const appenders = new Map();
 
 const tryLoading = (modulePath, config) => {
-  debug('Loading module from ', modulePath);
+  let resolvedPath;
+  try {
+    const modulePathCJS = `${modulePath}.cjs`;
+    resolvedPath = require.resolve(modulePathCJS);
+    debug('Loading module from ', modulePathCJS);
+  } catch (e) {
+    resolvedPath = modulePath;
+    debug('Loading module from ', modulePath);
+  }
   try {
     // eslint-disable-next-line global-require, import/no-dynamic-require
-    return require(modulePath);
+    return require(resolvedPath);
   } catch (e) {
     // if the module was found, and we still got an error, then raise it
     configuration.throwExceptionIf(
diff --git a/test/tap/dummy-appender.js b/test/tap/dummy-appender.cjs
similarity index 100%
rename from test/tap/dummy-appender.js
rename to test/tap/dummy-appender.cjs