diff --git a/CH-IUA-Validator/installation.md b/CH-IUA-Validator/installation.md
index fe3fef556d2e6f7f0b6443e9231e64e680d0d92e..b6a069b03505ff5223995a6de0eb53eec9605606 100755
--- a/CH-IUA-Validator/installation.md
+++ b/CH-IUA-Validator/installation.md
@@ -23,13 +23,13 @@ Here is a guide to help you installing the CH-IUA-Validator-Service.
 * Java virtual machine : JDK 11
 * Application server : Wildfly 18.0.1
 
-To install those requirements you can refer to the documentation of installation of Wildfly : [*General Requirements Wildfly 18*](https://gazelle.ihe.net/gazelle-documentation/General/wildfly18.html)
+To install those requirements you can refer to the documentation of installation of Wildfly : [*General Requirements Wildfly 18*](https://ehealthsuisse.ihe-europe.net/gazelle-documentation/General/wildfly18.html)
 
 ## Instructions
 
 Copy the chiua-validator-service.war into the "/usr/local/wildfly18/standalone/deployments" directory of your Wildfly server. Finally, start your server.
 
-When the application is deployed, open a browser and go to http://yourserver/chiua-validator-service/ModelBasedValidationWSImpl?wsdl in order to check of the service is available.
+Once the application is deployed, open a browser and go to http://yourserver/chiua-validator-service/ModelBasedValidationWSImpl?wsdl in order to check of the service is available.
 
 If the deployment is successful, you should see the WSDL page.
 
@@ -43,7 +43,7 @@ In EVSClient, go to the menu Administration > Manage referenced standards.
 If an CH:IUA standard has not been created yet, click on "Add a standard" button.
 *Otherwise, you should skip the instructions to the following part.*
 
-You can refer to the [*Add a referenced standard*](https://gazelle.ihe.net/gazelle-documentation/EVS-Client/installation.html#add-a-reference-to-a-standard) part of the installation manual of EVSClient.
+You can refer to the [*Add a referenced standard*](https://ehealthsuisse.ihe-europe.net/gazelle-documentation/EVS-Client/installation.html#add-a-reference-to-a-standard) part of the installation manual of EVSClient.
 
 ## Create a validation service
 
@@ -51,7 +51,7 @@ In EVSClient, go to the menu Administration > Manage validation services.
 If an CH:IUA Token validator service has not been created yet, click on "Create new validation service" button.
 *Otherwise, you should skip the instructions to the following part.*
 
-You can refer to the [*Adding a validation service*](https://gazelle.ihe.net/gazelle-documentation/EVS-Client/installation.html#adding-a-validation-service) part of the installation manual of EVSClient.
+You can refer to the [*Adding a validation service*](https://ehealthsuisse.ihe-europe.net/gazelle-documentation/EVS-Client/installation.html#adding-a-validation-service) part of the installation manual of EVSClient.
 
 ## Configure the menu
 
@@ -59,4 +59,4 @@ In EVSClient, go to the menu Administration > Menu configuration.
 If the CH:IUA standard has not been assigned yet to a menu, add it by editing the corresponding menu or click on "Create a new menu group" button if there is not any suitable group menu.
 *Otherwise, you should skip the instructions to the following part.*
 
-You can refer to the [*Configuring the top bar menu*](https://gazelle.ihe.net/gazelle-documentation/EVS-Client/installation.html#configuring-the-top-bar-menu) part of the installation manual of EVSClient.
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+You can refer to the [*Configuring the top bar menu*](https://ehealthsuisse.ihe-europe.net/gazelle-documentation/EVS-Client/installation.html#configuring-the-top-bar-menu) part of the installation manual of EVSClient.
\ No newline at end of file