diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a1d34e7a..9474bcd3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,7 +18,7 @@ jobs:
           - '2.6'
           - jruby-9.3
           - jruby-9.4
-        memcached-version: ['1.5.22', '1.6.18']
+        memcached-version: ['1.5.22', '1.6.20']
 
     steps:
     - uses: actions/checkout@v3