diff --git a/lib/workers/branch/index.js b/lib/workers/branch/index.js
index f4be140572d5703bddec465bb2ae2fb672d5776e..9d5e799603fdb54441f16ebe1661d3e4a6f02f86 100644
--- a/lib/workers/branch/index.js
+++ b/lib/workers/branch/index.js
@@ -66,7 +66,7 @@ async function processBranch(branchConfig) {
       logger.debug({ pr }, 'Found existing PR');
       pr = await platform.getPr(pr.number);
       if (pr.state.startsWith('open')) {
-        logger.debug({ pr }, 'Existing PR is open');
+        logger.debug('Existing PR is open');
         if (!pr.canRebase) {
           const subject = 'PR has been edited';
           logger.info(subject);