diff --git a/cloudevents/SDK.md b/cloudevents/SDK.md
index fe1203963..9073b43f8 100644
--- a/cloudevents/SDK.md
+++ b/cloudevents/SDK.md
@@ -186,7 +186,7 @@ Undo it when done:
 | [Avro](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/formats/avro-format.md)                                                    | :heavy_check_mark: |     | :x:  |     | :x: |     |     |        | :x: | :x:  |
 | [Avro Compact](https://github.com/cloudevents/spec/blob/main/cloudevents/working-drafts/avro-compact-format.md)                       | :heavy_check_mark: |     | :x:  |     | :x: |     |     |        |     | :x:  |
 | [JSON](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/formats/json-format.md)                                                    | :heavy_check_mark: |     | :heavy_check_mark:  | :heavy_check_mark: | :heavy_check_mark: |     |     | :heavy_check_mark:    | :heavy_check_mark: | :heavy_check_mark:  |
-| [Protobuf ](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/formats/protobuf-format.md)                                           | :heavy_check_mark: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |
+| [Protobuf ](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/formats/protobuf-format.md)                                           | :heavy_check_mark: |     | :heavy_check_mark:  | :heavy_check_mark:  | :x: |     |     |        | :x: | :x:  |
 | Bindings / Content Modes                                                                                                                      |
 | [AMQP Binary](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/bindings/amqp-protocol-binding.md#31-binary-content-mode)           | :heavy_check_mark: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |
 | [AMQP Structured](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/bindings/amqp-protocol-binding.md#32-structured-content-mode)   | :heavy_check_mark: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |
@@ -210,7 +210,7 @@ Undo it when done:
 | Event Formats                                                                                                                                 |
 | [AMQP](https://github.com/cloudevents/spec/blob/v0.3/amqp-format.md)                                                                          | :x: |     | :x:  |     | :x: |     |     |        | :x: | :x:  |
 | [JSON](https://github.com/cloudevents/spec/blob/v0.3/json-format.md)                                                                          | :x: |     | :heavy_check_mark:  | :heavy_check_mark: | :heavy_check_mark: |     |     | :heavy_check_mark:    | :heavy_check_mark: | :heavy_check_mark:  |
-| [Protobuf](https://github.com/cloudevents/spec/blob/v0.3/protobuf-format.md)                                                                  | :x: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |
+| [Protobuf](https://github.com/cloudevents/spec/blob/v0.3/protobuf-format.md)                                                                  | :x: |     | :heavy_check_mark:  | :heavy_check_mark:  | :x: |     |     |        | :x: | :x:  |
 | Bindings / Content Modes                                                                                                                      |
 | [AMQP Binary](https://github.com/cloudevents/spec/blob/v0.3/amqp-transport-binding.md#31-binary-content-mode)                                 | :x: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |
 | [AMQP Structured](https://github.com/cloudevents/spec/blob/v0.3/amqp-transport-binding.md#32-structured-content-mode)                         | :x: |     | :heavy_check_mark:  |     | :x: |     |     |        | :x: | :x:  |