diff --git a/controllers/releases.php b/controllers/releases.php
index 1a9ba6f48d50b26b406a16a03dd0c59eeca95cf7..72dc7d01d806248ace6404af4c99c8bf68f730c4 100644
--- a/controllers/releases.php
+++ b/controllers/releases.php
@@ -174,7 +174,7 @@ final class ReleasesController extends \TracToGitlab\Controller
         $headers = [];
         while (($line = strtok("\r\n")) !== false) {
             $chunks = explode(':', $line, 2);
-            if ($chunks !== false) {
+            if ($chunks !== false && count($chunks) === 2) {
                 $headers[$chunks[0]] = $chunks[1];
             }
         }