diff --git a/ruby-sdk/Cargo.lock b/ruby-sdk/Cargo.lock
index b192efb9..49cdead7 100644
--- a/ruby-sdk/Cargo.lock
+++ b/ruby-sdk/Cargo.lock
@@ -1498,9 +1498,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.147"
+version = "1.0.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6af14725505314343e673e9ecb7cd7e8a36aa9791eb936235a3567cc31447ae4"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
 dependencies = [
  "itoa",
  "memchr",
@@ -2479,6 +2479,6 @@ dependencies = [
 
 [[package]]
 name = "zmij"
-version = "0.1.9"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0095ecd462946aa3927d9297b63ef82fb9a5316d7a37d134eeb36e58228615a"
+checksum = "ac93432f5b761b22864c774aac244fa5c0fd877678a4c37ebf6cf42208f9c9ec"
diff --git a/ruby-sdk/ext/eppo_client/Cargo.toml b/ruby-sdk/ext/eppo_client/Cargo.toml
index 3230f0b4..773085ae 100644
--- a/ruby-sdk/ext/eppo_client/Cargo.toml
+++ b/ruby-sdk/ext/eppo_client/Cargo.toml
@@ -18,5 +18,5 @@ magnus = { version = "0.8.2" }
 serde = { version = "1.0.203", features = ["derive"] }
 serde_magnus = "0.10.0"
 rb-sys = "0.9.124"
-serde_json = "1.0.147"
+serde_json = "1.0.149"
 tokio = { version = "1.49.0", default-features = false, features = ["time"] }