diff --git a/modules/openapi-generator/src/main/resources/powershell/configuration.mustache b/modules/openapi-generator/src/main/resources/powershell/configuration.mustache
index 0e674f1f560c..ffc9ca50d095 100644
--- a/modules/openapi-generator/src/main/resources/powershell/configuration.mustache
+++ b/modules/openapi-generator/src/main/resources/powershell/configuration.mustache
@@ -173,8 +173,8 @@ function Set-{{{apiNamePrefix}}}Configuration {
         }
 
         If ($null -ne $Proxy) {
-            If ($Proxy.GetType().FullName -ne "System.Net.SystemWebProxy" -and $Proxy.GetType().FullName -ne "System.Net.WebRequest+WebProxyWrapperOpaque") {
-                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must be System.Net.SystemWebProxy or System.Net.WebRequest+WebProxyWrapperOpaque."
+            If ('System.Net.IWebProxy' -notin $Proxy.GetType().ImplementedInterfaces.FullName) {
+                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must implement System.Net.IWebProxy interface."
             }
             $Script:Configuration['Proxy'] = $Proxy
         } else {
diff --git a/samples/client/echo_api/powershell/src/PSOpenAPITools/Client/Configuration.ps1 b/samples/client/echo_api/powershell/src/PSOpenAPITools/Client/Configuration.ps1
index 9e1aa107bbc1..baf8dbe0fd99 100644
--- a/samples/client/echo_api/powershell/src/PSOpenAPITools/Client/Configuration.ps1
+++ b/samples/client/echo_api/powershell/src/PSOpenAPITools/Client/Configuration.ps1
@@ -180,8 +180,8 @@ function Set-Configuration {
         }
 
         If ($null -ne $Proxy) {
-            If ($Proxy.GetType().FullName -ne "System.Net.SystemWebProxy" -and $Proxy.GetType().FullName -ne "System.Net.WebRequest+WebProxyWrapperOpaque") {
-                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must be System.Net.SystemWebProxy or System.Net.WebRequest+WebProxyWrapperOpaque."
+            If ('System.Net.IWebProxy' -notin $Proxy.GetType().ImplementedInterfaces.FullName) {
+                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must implement System.Net.IWebProxy interface."
             }
             $Script:Configuration['Proxy'] = $Proxy
         } else {
diff --git a/samples/client/petstore/powershell/src/PSPetstore/Client/PSConfiguration.ps1 b/samples/client/petstore/powershell/src/PSPetstore/Client/PSConfiguration.ps1
index d655e6f997b2..043b2f9e8464 100644
--- a/samples/client/petstore/powershell/src/PSPetstore/Client/PSConfiguration.ps1
+++ b/samples/client/petstore/powershell/src/PSPetstore/Client/PSConfiguration.ps1
@@ -179,8 +179,8 @@ function Set-PSConfiguration {
         }
 
         If ($null -ne $Proxy) {
-            If ($Proxy.GetType().FullName -ne "System.Net.SystemWebProxy" -and $Proxy.GetType().FullName -ne "System.Net.WebRequest+WebProxyWrapperOpaque") {
-                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must be System.Net.SystemWebProxy or System.Net.WebRequest+WebProxyWrapperOpaque."
+            If ('System.Net.IWebProxy' -notin $Proxy.GetType().ImplementedInterfaces.FullName) {
+                throw "Incorrect Proxy type '$($Proxy.GetType().FullName)'. Must implement System.Net.IWebProxy interface."
             }
             $Script:Configuration['Proxy'] = $Proxy
         } else {