diff --git a/core/include/Checker.ps1 b/core/include/Checker.ps1
index b408c84..97720eb 100644
--- a/core/include/Checker.ps1
+++ b/core/include/Checker.ps1
@@ -17,11 +17,7 @@ $Checker | Add-Member -membertype ScriptMethod -name 'Start' -value {
     $WindowsInformations = Get-CimInstance Win32_OperatingSystem;
     $this.version        = $WindowsInformations.CimInstanceProperties['Version'].Value;
     $this.os             = $WindowsInformations.CimInstanceProperties['Caption'].Value;
-    $this.fqdn           = [string]::Format(
-        '{0}.{1}',
-        (Get-WmiObject Win32_ComputerSystem).DNSHostName,
-        (Get-WmiObject win32_computersystem).Domain
-    );
+    $this.fqdn           = [System.Net.Dns]::GetHostEntry('localhost').HostName;
 
     $Icinga2.Log.Write(
         $Icinga2.Enums.LogState.Info,
diff --git a/core/include/utils/SSL.ps1 b/core/include/utils/SSL.ps1
index db32805..3db0349 100644
--- a/core/include/utils/SSL.ps1
+++ b/core/include/utils/SSL.ps1
@@ -24,11 +24,7 @@ $SSL | Add-Member -membertype ScriptMethod -name 'LoadServerCertificate' -value
 
         # Try to discover the certificate based on our FQDN
         if ([string]::IsNullOrEmpty($CertName) -eq $TRUE -And [string]::IsNullOrEmpty($CertThumbprint) -eq $TRUE) {
-            $CertName = [string]::Format(
-                '{0}.{1}',
-                (Get-WmiObject Win32_ComputerSystem).DNSHostName,
-                (Get-WmiObject win32_computersystem).Domain
-            );
+            $CertName = [System.Net.Dns]::GetHostEntry('localhost').HostName;
 
             $Icinga2.Log.Write(
                 $Icinga2.Enums.LogState.Info,