diff --git a/ruby-sdk/Cargo.lock b/ruby-sdk/Cargo.lock
index 36956aef..f403fcae 100644
--- a/ruby-sdk/Cargo.lock
+++ b/ruby-sdk/Cargo.lock
@@ -1477,9 +1477,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.133"
+version = "1.0.142"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7fceb2473b9166b2294ef05efcb65a3db80803f0b03ef86a5fc88a2b85ee377"
+checksum = "030fedb782600dcbd6f02d479bf0d817ac3bb40d644745b769d6a96bc3afc5a7"
 dependencies = [
  "itoa",
  "memchr",
diff --git a/ruby-sdk/ext/eppo_client/Cargo.toml b/ruby-sdk/ext/eppo_client/Cargo.toml
index 981114b4..719c6fb6 100644
--- a/ruby-sdk/ext/eppo_client/Cargo.toml
+++ b/ruby-sdk/ext/eppo_client/Cargo.toml
@@ -18,5 +18,5 @@ magnus = { version = "0.7.1" }
 serde = { version = "1.0.203", features = ["derive"] }
 serde_magnus = "0.9.0"
 rb-sys = "0.9.105"
-serde_json = "1.0.128"
+serde_json = "1.0.142"
 tokio = { version = "1.44.1", default-features = false, features = ["time"] }