diff --git a/InstallingCodeReadyWorkspacesOnOpenShift.md b/InstallingCodeReadyWorkspacesOnOpenShift.md
index 960f62e..59fc332 100644
--- a/InstallingCodeReadyWorkspacesOnOpenShift.md
+++ b/InstallingCodeReadyWorkspacesOnOpenShift.md
@@ -55,7 +55,7 @@ To provide enough storage for multiple workspaces, I am setting the size of this
 These parameters are passed via `config.yaml` file that you get along with the deploy script. 
 
 ```
-$ sed -i.bak -e "s/CHE_INFRA_KUBERNETES_PVC_QUANTITY: \"\"/CHE_INFRA_KUBERNETES_PVC_QUANTITY: \"5Gi\"/" config.yaml 
+$ sed -i '/CHE_INFRA_KUBERNETES_PVC_QUANTITY/s/""/"5Gi"/' config.yaml 
 ```
 Run the installer with the command `$ ./deploy.sh --deploy --project=wrkspc` and observe the output. The installer spins up an operator that does the installation of CodeReady Workspace Master, Keycloak server and the backend Postgresql database.
 
@@ -145,4 +145,4 @@ You will now see the KeyCloak dashboard.
 
 
 Click on the `Users` menu on the left and `View all users` to see the list of users. You should see the self registered user there. Explore all the options you have to manage the users here.
-![](./images/9.InstallCodeReady.png)
\ No newline at end of file
+![](./images/9.InstallCodeReady.png)