diff --git a/Cargo.lock b/Cargo.lock
index 960c1d94..6887bad5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,7 +56,7 @@ checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 
 [[package]]
 name = "async-signature"
-version = "0.6.0-pre.1"
+version = "0.6.0-pre.4"
 dependencies = [
  "signature 2.3.0-pre.4",
 ]
@@ -789,6 +789,12 @@ version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -1109,11 +1115,12 @@ 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/elliptic-curve/Cargo.toml b/elliptic-curve/Cargo.toml
index c64574e7..4b75d7c8 100644
--- a/elliptic-curve/Cargo.toml
+++ b/elliptic-curve/Cargo.toml
@@ -35,7 +35,7 @@ pem-rfc7468 = { version = "1.0.0-rc.0", optional = true, features = ["alloc"] }
 pkcs8 = { version = "0.11.0-rc.0", optional = true, default-features = false }
 sec1 = { version = "0.8.0-rc.0", optional = true, features = ["subtle", "zeroize"] }
 serdect = { version = "=0.3.0-pre.0", optional = true, default-features = false, features = ["alloc"] }
-serde_json = { version = "1.0.114", optional = true, default-features = false, features = ["alloc"] }
+serde_json = { version = "1.0.121", optional = true, default-features = false, features = ["alloc"] }
 tap = { version = "1.0.1", optional = true, default-features = false } # hack for minimal-versions support for `bits`
 
 [dev-dependencies]