diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a7bb1f8..74e701d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,9 +11,9 @@ jobs:
         dynamic: [0, 1]
         nginx:
           # Mainline
-          - 1.21.3
+          - 1.21.6
           # Stable.
-          - 1.20.1
+          - 1.20.2
           # First version with loadable module support.
           - 1.9.15
           # Oldest supported version.