diff --git a/Cargo.lock b/Cargo.lock
index 2a32e43f40..e53073a3c1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4095,11 +4095,12 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.120"
+version = "1.0.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e0d21c9a8cae1235ad58a00c11cb40d4b1e5c784f1ef2c537876ed6ffd8b7c5"
+checksum = "4ab380d7d9f22ef3f21ad3e6c1ebe8e4fc7a2000ccba2e4d71fc96f15b2cb609"
 dependencies = [
  "itoa",
+ "memchr",
  "ryu",
  "serde",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index caeaf6bd2d..0fa3f23147 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -100,7 +100,7 @@ scale-encode = { version = "0.7.1", default-features = false }
 scale-typegen = "0.8.0"
 scale-typegen-description = "0.8.0"
 serde = { version = "1.0.204", default-features = false, features = ["derive"] }
-serde_json = { version = "1.0.120", default-features = false }
+serde_json = { version = "1.0.121", default-features = false }
 syn = { version = "2.0.15", features = ["full", "extra-traits"] }
 thiserror = "1.0.63"
 tokio = { version = "1.38", default-features = false }