diff --git a/tasks/timescale_db_deb.yml b/tasks/timescale_db_deb.yml
index 9a567b0..530e322 100644
--- a/tasks/timescale_db_deb.yml
+++ b/tasks/timescale_db_deb.yml
@@ -16,7 +16,7 @@
         types: [deb]
         uris: "{{ timescale_db_ubuntu_repo_url }}"
         components:
-          - [main]
+          - main
         suites: ["{{ ansible_distribution_release | lower }}"]
         signed_by: "{{ timescale_db_repo_key }}"
         state: present