diff --git a/PlanGrid.Api/PlanGridHttpHandler.cs b/PlanGrid.Api/PlanGridHttpHandler.cs
index 6df5840..95e4221 100644
--- a/PlanGrid.Api/PlanGridHttpHandler.cs
+++ b/PlanGrid.Api/PlanGridHttpHandler.cs
@@ -42,7 +42,7 @@ protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage
                     request.Content = new StringContent("", Encoding.UTF8, "application/json");
                 }
 
-                request.Headers.Authorization = new AuthenticationHeaderValue("Basic", authenticationToken);
+                request.Headers.Add("Authorization", "Bearer " + accessToken);
                 request.Headers.Accept.Add(MediaTypeWithQualityHeaderValue.Parse($"application/vnd.plangrid+json; version={version}"));
 
                 HttpResponseMessage response = await base.SendAsync(request, cancellationToken);
@@ -87,4 +87,4 @@ private string BuildAuthenticationToken(string accessToken)
             return encodedAuthParams;
         }
     }
-}
\ No newline at end of file
+}