diff --git a/docs.it4i/salomon/hardware-overview.md b/docs.it4i/salomon/hardware-overview.md
index 3eab396980dadf090215541b95b3be00d73a0b47..360999dfbc7b36701e65a164be034fa9fd552092 100644
--- a/docs.it4i/salomon/hardware-overview.md
+++ b/docs.it4i/salomon/hardware-overview.md
@@ -16,7 +16,7 @@ The parameters are summarized in the following tables:
 | ------------------------------------------- | ------------------------------------------- |
 | Primary purpose                             | High Performance Computing                  |
 | Architecture of compute nodes               | x86-64                                      |
-| Operating system                            | CentOS 6.x Linux                            |
+| Operating system                            | CentOS 7.x Linux                            |
 | [**Compute nodes**][2]                      |                                             |
 | Totally                                     | 1008                                        |
 | Processor                                   | 2 x Intel Xeon E5-2680v3, 2.5 GHz, 12 cores |