diff --git a/ShopifyNet/OAuth/ShopifyOAuthClient.cs b/ShopifyNet/OAuth/ShopifyOAuthClient.cs
index 82940e8..cee18c8 100644
--- a/ShopifyNet/OAuth/ShopifyOAuthClient.cs
+++ b/ShopifyNet/OAuth/ShopifyOAuthClient.cs
@@ -401,6 +401,8 @@ private async Task<T> RequestAccessTokenAsync<T>(string myShopifyDomain, Diction
 
         using var request = new HttpRequestMessage(HttpMethod.Post, $"https://{myShopifyDomain}/admin/oauth/access_token")
         {
+            Version = HttpVersion.Version20,
+            VersionPolicy = HttpVersionPolicy.RequestVersionOrLower,
             Content = new FormUrlEncodedContent(parameters)
         };
         request.Headers.Accept.ParseAdd("application/json");