diff --git a/Cargo.lock b/Cargo.lock
index 60469c21..d035bfb2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -377,9 +377,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.119"
+version = "1.0.120"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8eddb61f0697cc3989c5d64b452f5488e2b8a60fd7d5076a3045076ffef8cb0"
+checksum = "4e0d21c9a8cae1235ad58a00c11cb40d4b1e5c784f1ef2c537876ed6ffd8b7c5"
 dependencies = [
  "itoa",
  "ryu",
diff --git a/harness-support/rust/Cargo.toml b/harness-support/rust/Cargo.toml
index 1c7dd58b..364cfc48 100644
--- a/harness-support/rust/Cargo.toml
+++ b/harness-support/rust/Cargo.toml
@@ -10,5 +10,5 @@ regress = "0.10.0"
 # https://github.com/Marwes/schemafy/pull/76
 # schemafy = { git = "https://github.com/woodruffw-forks/schemafy", rev = "de28e87" }
 serde = { version = "1.0.204", features = ["derive"] }
-serde_json = "1.0.119"
+serde_json = "1.0.120"
 typify = "0.1.0"
diff --git a/harness/rust-rustls/Cargo.toml b/harness/rust-rustls/Cargo.toml
index f0705d68..d30874f2 100644
--- a/harness/rust-rustls/Cargo.toml
+++ b/harness/rust-rustls/Cargo.toml
@@ -7,5 +7,5 @@ edition = "2021"
 limbo-harness-support = { path = "../../harness-support/rust" }
 chrono = "0.4.38"
 pem = "3.0.4"
-serde_json = "1.0.119"
+serde_json = "1.0.120"
 rustls-webpki = { version = "0.102.5", features = ["std"] }
diff --git a/harness/rust-webpki/Cargo.toml b/harness/rust-webpki/Cargo.toml
index b82c6544..d3e59bd5 100644
--- a/harness/rust-webpki/Cargo.toml
+++ b/harness/rust-webpki/Cargo.toml
@@ -7,5 +7,5 @@ edition = "2021"
 limbo-harness-support = { path = "../../harness-support/rust" }
 chrono = "0.4.38"
 pem = "3.0.4"
-serde_json = "1.0.119"
+serde_json = "1.0.120"
 webpki = { version = "0.22.4", features = ["std"] }