diff --git a/lib/workers/pr/changelog/index.ts b/lib/workers/pr/changelog/index.ts
index 237cecf7706b69987f6bbcceac3360068c77b2a1..c6b45557c29f24f0e0280481acd65c9396050b14 100644
--- a/lib/workers/pr/changelog/index.ts
+++ b/lib/workers/pr/changelog/index.ts
@@ -20,7 +20,9 @@ export async function getChangeLogJSON(
     if (version.equals(fromVersion, toVersion)) {
       return null;
     }
-
+    logger.debug(
+      `Fetching changelog: ${sourceUrl} (${fromVersion} -> ${toVersion})`
+    );
     const releases = args.releases || (await getInRangeReleases(args));
 
     let res: ChangeLogResult | null = null;