diff --git a/docs.it4i/software/tools/singularity-it4i.md b/docs.it4i/software/tools/singularity-it4i.md
index 04eab6e611825e8b64a12a77b990c438d983e2cf..27a083f13f5f86321352186ede4ffdbe731a11fd 100644
--- a/docs.it4i/software/tools/singularity-it4i.md
+++ b/docs.it4i/software/tools/singularity-it4i.md
@@ -9,11 +9,14 @@ Our bootstrap for create image, wrappers, features are [here](https://code.it4i.
       ├── CentOS                  ├── CentOS
       │   ├── 6.9                 │   ├── 6.9
       │   ├── 6.9-MIC             │   ├── 6.9-GPU
-      │   └── 7.3                 │   └── 7.3
-      ├── Debian                  ├── Debian
-      │   └── 8.0                 │   └── 8.0
-      └── Ubuntu                  └── Ubuntu
-          └── 16.04                   └── 16.04
+      │   └── 7.4                 │   ├── 7.4
+      ├── Debian                  │   └── 7.4-GPU
+      │   └── 8.0                 ├── Debian
+      └── Ubuntu                  │   ├── 8.0
+          └── 16.04               │   └── 8.0-GPU
+                                  └── Ubuntu
+                                      ├── 16.04
+                                      └── 16.04-GPU
 ```
 
 For current information on available singularity images, refer to the `ml av` and see statement the `OS`