diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ee86b4a..fc8f229 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ name: Continuous Integration
 on:
   push:
     # hardcoded list; GitHub does not support wildcards in branch names AFAICT
-    branches: [ "main", "1.4.x", "1.5.x", "1.6.x", "1.7.x", "1.8.x", "1.9.x", "1.10.x", "1.11.x" ]
+    branches: [ "main", "1.4.x", "1.5.x", "1.6.x", "1.7.x", "2.0.x", "2.1.x", "2.2.x", "2.3.x", "2.4.x", "2.5.x", "2.6.x", "2.7.x", "2.8.x"]
   pull_request:
     branches: [ "main" ]
   workflow_dispatch:  # Enables manual invocation via "Run workflow" button in the Actions UI