diff --git a/defaults/main.yml b/defaults/main.yml
index 9a71db0..2ecd862 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -96,7 +96,7 @@ geth_consul_tags: '{{ geth_consul_default_tags + geth_consul_extra_tags }}'
 # resources limits to avoid killing the host
 # Geth cache usage limit
 geth_cache_ratio: 0.4
-geth_cache_size: '{{ (ansible_memtotal_mb * geth_cache_ratio|float) | int }}'
+geth_cache_size: '{{ (((ansible_memtotal_mb * geth_cache_ratio|float) / 1204) | round | int) * 1024 | int }}'
 # Container memory limits
 geth_cont_mem_ratio: 0.6
 geth_cont_mem_limit: '{{ (ansible_memtotal_mb * geth_cont_mem_ratio|float) | int }}'