diff --git a/libp2p/CHANGELOG.md b/libp2p/CHANGELOG.md
index 9b41d2d570a..4161ed054c5 100644
--- a/libp2p/CHANGELOG.md
+++ b/libp2p/CHANGELOG.md
@@ -3,6 +3,10 @@
 - Include gossipsub when compiling for wasm.
   See [PR 4217].
 
+- Add `json` feature which exposes `request_response::json`.
+  See [PR 4188].
+
+[PR 4188]: https://github.com/libp2p/rust-libp2p/pull/4188
 [PR 4217]: https://github.com/libp2p/rust-libp2p/pull/4217
 
 ## 0.52.1
diff --git a/libp2p/Cargo.toml b/libp2p/Cargo.toml
index 280c2d58e05..fd9290cf506 100644
--- a/libp2p/Cargo.toml
+++ b/libp2p/Cargo.toml
@@ -23,6 +23,7 @@ full = [
     "floodsub",
     "gossipsub",
     "identify",
+    "json",
     "kad",
     "macros",
     "mdns",
@@ -60,6 +61,7 @@ ed25519 = ["libp2p-identity/ed25519"]
 floodsub = ["dep:libp2p-floodsub"]
 gossipsub = ["dep:libp2p-gossipsub", "libp2p-metrics?/gossipsub"]
 identify = ["dep:libp2p-identify", "libp2p-metrics?/identify"]
+json = ["libp2p-request-response?/json"]
 kad = ["dep:libp2p-kad", "libp2p-metrics?/kad"]
 macros = ["libp2p-swarm/macros"]
 mdns = ["dep:libp2p-mdns"]