diff --git a/lib/web_push/errors.rb b/lib/web_push/errors.rb
index e4fa313..2554e8a 100644
--- a/lib/web_push/errors.rb
+++ b/lib/web_push/errors.rb
@@ -26,4 +26,6 @@ class PayloadTooLarge < ResponseError; end
   class TooManyRequests < ResponseError; end
 
   class PushServiceError < ResponseError; end
+
+  class EdgeThrottled < ResponseError; end
 end
diff --git a/lib/web_push/request.rb b/lib/web_push/request.rb
index 7b8780a..71a581d 100644
--- a/lib/web_push/request.rb
+++ b/lib/web_push/request.rb
@@ -147,6 +147,8 @@ def verify_response(resp)
       elsif resp.is_a?(Net::HTTPUnauthorized) || resp.is_a?(Net::HTTPForbidden) || # 401, 403
             resp.is_a?(Net::HTTPBadRequest) && resp.message == 'UnauthorizedRegistration' # 400, Google FCM
         raise Unauthorized.new(resp, uri.host)
+      elsif resp.is_a?(Net::HTTPNotAcceptable) && uri.host.to_s.ends_with?("notify.windows.com") #406 on Edge
+        raise EdgeThrottled.new(resp, uri.host)
       elsif resp.is_a?(Net::HTTPRequestEntityTooLarge) # 413
         raise PayloadTooLarge.new(resp, uri.host)
       elsif resp.is_a?(Net::HTTPTooManyRequests) # 429, try again later!