diff --git a/lib/platform/github/index.js b/lib/platform/github/index.js
index 16da633074065ef209ed6f7419bb3e22d3e85ed8..f4a16b1c665fc30542d3ea30095b1dd850f8192f 100644
--- a/lib/platform/github/index.js
+++ b/lib/platform/github/index.js
@@ -431,18 +431,14 @@ async function addAssignees(issueNo, assignees) {
   });
 }
 
-async function addReviewers(issueNo, reviewers) {
-  logger.debug(`Adding reviewers ${reviewers} to #${issueNo}`);
+async function addReviewers(prNo, reviewers) {
+  logger.debug(`Adding reviewers ${reviewers} to #${prNo}`);
   const res = await get.post(
     `repos/${config.parentRepo ||
-      config.repoName}/pulls/${issueNo}/requested_reviewers`,
+      config.repoName}/pulls/${prNo}/requested_reviewers`,
     {
-      headers: {
-        accept: 'application/vnd.github.thor-preview+json',
-      },
       body: {
         reviewers,
-        team_reviewers: [],
       },
     }
   );
diff --git a/test/platform/github/__snapshots__/index.spec.js.snap b/test/platform/github/__snapshots__/index.spec.js.snap
index f32faa920ead4ade90f95f28a4aabba4bb66785a..1be12fb0c2f5fd4b1ce9695fe8a73b1f0e168fd5 100644
--- a/test/platform/github/__snapshots__/index.spec.js.snap
+++ b/test/platform/github/__snapshots__/index.spec.js.snap
@@ -26,10 +26,6 @@ Array [
           "someuser",
           "someotheruser",
         ],
-        "team_reviewers": Array [],
-      },
-      "headers": Object {
-        "accept": "application/vnd.github.thor-preview+json",
       },
     },
   ],