diff --git a/.gitignore b/.gitignore
index 9307131..151155b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,3 +20,6 @@ vendor/
 # Docs generated from our openapi repo
 api/cli.yml
 api/cli.gen.yml
+
+# GPG private key generated by CI during release.
+private.key