diff --git a/docs.it4i/software/tools/singularity-it4i.md b/docs.it4i/software/tools/singularity-it4i.md
index 683ff07255da3fab0e589188e0ef6fce120e77f9..fb3d3d80411c92ad265fe9db769fa6591ddfe856 100644
--- a/docs.it4i/software/tools/singularity-it4i.md
+++ b/docs.it4i/software/tools/singularity-it4i.md
@@ -5,18 +5,18 @@ On clusters, we have different versions of singularity images of operating syste
 Our bootstrap for create image, wrappers, features are [here](https://code.it4i.cz/sccs/it4i-singularity).
 
 ```console
-   Salomon				Anselm
-      ├── CentOS			├── CentOS
-      │   ├── 6.9			│   ├── 6.9
-      │   ├── 6.9-MIC			│   ├── 6.9-GPU
-      │   └── 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
+   Salomon                 Anselm
+      ├── CentOS             ├── CentOS
+      │   ├── 6.9            │   ├── 6.9
+      │   ├── 6.9-MIC        │   ├── 6.9-GPU
+      │   └── 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`