diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index a7c25df..15fb8e4 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -85,7 +85,7 @@ jobs:
           # Server port, default 25:
           #server_port: 465
           secure: false
-          subject: CI Error in ${{ GITHUB_REPOSITORY }}
+          subject: "CI Error in ${{ GITHUB_REPOSITORY }}"
           to: michael.grote@posteo.de
           from: Gitea Actions
           # Optional plain body: