diff --git a/.github/workflows/perl.yml b/.github/workflows/perl.yml
index 5f463d4..e5100e2 100644
--- a/.github/workflows/perl.yml
+++ b/.github/workflows/perl.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         perl-version:
-          - '5.20'
+          - '5.20-buster'
           - 'latest'
           - 'threaded'