diff --git a/Cargo.toml b/Cargo.toml
index ad438b8..606e1fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,7 @@ serde-transcode = "1.1"
 #ciborium = "0.2"
 #envy = "0.4" # No `Deserializer` exposed.
 #envy-store = "0.1" # No `Deserializer` exposed.
+#flexbuffers = "2.0" # `Serializer` and `Deserializer` exposed does not provieded required API.
 serde_json = "1.0"
 json5 = "0.4"
 #serde-lexpr = "0.1"
diff --git a/README.md b/README.md
index b64ec69..551abf9 100644
--- a/README.md
+++ b/README.md
@@ -27,21 +27,24 @@ tradaf RON json < examples/gameConfig.ron | jq .key_bindings | tradaf Json yaml
 * [ ] Implement all [data formats](https://serde.rs/#data-formats), or at least the one that expose a serde serializer or deserializer.
   * [ ] BSON
   * [ ] CBOR
-  * [ ] DBus (not sure it is working, but it compile…)
+  * [-] DBus (not sure it is working, but it compile…)
   * [ ] Envy (deserialization only)
   * [ ] Envy store (deserialization only)
-  * [ ] GVariant => See DBus: the same crate propose both
+  * [ ] FlexBuffer
+    * The `Serializer` and `Deserializer` exposed does not work with serde-transcode.
+  * [-] GVariant => See DBus: the same crate propose both
   * [X] JSON
-  * [ ] JSON5
+  * [-] JSON5
     * [X] Deserialization
     * [ ] Serialization
-  * [X] S-Expressions (lisp)
+  * [ ] https://github.com/Lucretiel/kaydle
+  * [ ] S-Expressions (lisp)
   * [X] Pickle
     * [ ] Test properly both way
-  * [ ] Query String (URL)
+  * [-] Query String (URL)
     * [ ] Deserialization
     * [X] Serialization
-  * [ ] MessagePack
+  * [-] MessagePack
     * [ ] Deserialization
     * [X] Serialization
   * [X] RON
diff --git a/src/lib.rs b/src/lib.rs
index 5d87528..069dc32 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -34,6 +34,7 @@ pub enum Input {
     //Bson,
     //Cbor,
     DBus,
+    //FlexBuffer,
     GVariant,
     Json,
     Json5,
@@ -51,6 +52,7 @@ pub enum Output {
     //Bson,
     //Cbor,
     DBus,
+    //FlexBuffer,
     GVariant,
     Json,
     //Json5,    // NOTE: The crate is not noted "(deserialization only)" on the [serde listing](https://serde.rs/#data-formats) but it does not expose a `Serializer`
@@ -108,6 +110,14 @@ fn de(opt: &Opt, input: &mut dyn Read, output: &mut dyn Write) {
             );
             ser(opt, &mut deserializer, output);
         }
+        /*
+        Input::FlexBuffer => {
+            use serde_yaml::Deserializer;
+
+            let deserializer = Deserializer::from_reader(input);
+            ser(opt, deserializer, output);
+        }
+        */
         Input::GVariant => {
             use zvariant::gvariant::Deserializer;
             use zvariant::EncodingContext;
@@ -219,6 +229,17 @@ where
             //            let mut deserializer = Deserializer::new();
             serde_transcode::transcode(deserializer, serializer).unwrap();
         }
+        /*
+        Output::FlexBuffer => {
+            use flexbuffers::FlexbufferSerializer as Serializer;
+
+            let serializer = &mut Serializer::new(/*output*/);
+
+            // serde_transcode::transcode(deserializer, serializer).unwrap();
+            let r = flexbuffers::Reader::get_root(serializer.view()).unwrap();
+            println!("{}", r);
+        }
+        */
         Output::GVariant => {
             use zvariant::gvariant::Serializer;
             use zvariant::EncodingContext;