diff --git a/README.md b/README.md
index 787a280..b7c9c7a 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ The full types with template parameters can be found in the [parallel_hashmap/ph
 ## Memory usage
 
 |  type                 |    memory usage   | additional memory usage when resizing  |
-|-----------------------|-------------------|
+|-----------------------|-------------------|----------------------------------------|
 | flat tables           | ![flat_mem_usage](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/flat_mem_usage.gif?raw=true) | ![flat_peak_usage](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/flat_peak.gif?raw=true) | 
 | node tables           | ![node_mem_usage](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/node_mem_usage.gif?raw=true) | ![flat_node_usage](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/flat_node.gif?raw=true) | 
 | parallel flat tables  | ![flat_mem_usage](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/flat_mem_usage.gif?raw=true) | ![parallel_flat_peak](https://github.com/greg7mdp/parallel-hashmap/blob/master/html/img/parallel_flat_peak.gif?raw=true) |