diff --git a/config.yaml b/config.yaml
index 5c634c3a..6b3c8edd 100644
--- a/config.yaml
+++ b/config.yaml
@@ -380,14 +380,14 @@ options:
   sysctl:
     type: string
     default: |
-      { vm.swappiness : 1,
-        net.ipv4.neigh.default.gc_thresh1 : 128,
+      { net.ipv4.neigh.default.gc_thresh1 : 128,
         net.ipv4.neigh.default.gc_thresh2 : 28672,
         net.ipv4.neigh.default.gc_thresh3 : 32768,
         net.ipv6.neigh.default.gc_thresh1 : 128,
         net.ipv6.neigh.default.gc_thresh2 : 28672,
         net.ipv6.neigh.default.gc_thresh3 : 32768,
         net.nf_conntrack_max : 1000000,
+        net.netfilter.nf_conntrack_buckets : 204800,
         net.netfilter.nf_conntrack_max : 1000000 }
     description: |
       YAML formatted associative array of sysctl values, e.g.: