diff --git a/README.md b/README.md
index b1f7c8b..4e79a32 100644
--- a/README.md
+++ b/README.md
@@ -280,16 +280,17 @@ Otherwise start the container that should be registered and execute
 SUSEConnect -e <youremailaddress> -r <yourregistrationcode>
 ```
 
-In case you have a registration code that hasn't otherwise be used, you
-can use the USERNAME "regcode" and the given registration code as password.
+In case you have an unused registration code, you can connect with the username "regcode" and use the registration code as the password.
 
 For interactive use of containers you can also
-pass the obtained username and password via environment variables
+pass the obtained username, password and system token via environment variables:
 
 ```bash
 docker run -e SCC_CREDENTIAL_USERNAME=<credential_username> \
     -e SCC_CREDENTIAL_PASSWORD=<credential_password> \
+    -e SCC_CREDENTIAL_SYSTEM_TOKEN=<system_token> \
     my-image
+```
 
 # License
 
diff --git a/internal/credentials.go b/internal/credentials.go
index d5f78d5..ddabb6d 100644
--- a/internal/credentials.go
+++ b/internal/credentials.go
@@ -45,10 +45,12 @@ func (cr *Credentials) locations() []string {
 func (cr *Credentials) onLocationsNotFound() bool {
 	env_user := os.Getenv("SCC_CREDENTIAL_USERNAME")
 	env_pass := os.Getenv("SCC_CREDENTIAL_PASSWORD")
+	env_system_token := os.Getenv("SCC_CREDENTIAL_SYSTEM_TOKEN")
 
 	if env_user != "" && env_pass != "" {
 		cr.Username = env_user
 		cr.Password = env_pass
+		cr.SystemToken = env_system_token
 		return true
 	}