diff --git a/Cargo.toml b/Cargo.toml
index 06003d6d..25b6b4dc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,8 @@ halo2_proofs = { git = "https://github.com/privacy-scaling-explorations/halo2.gi
 polyexen = { git = "https://github.com/Dhole/polyexen.git", rev = "16a85c5411f804dc49bbf373d24ff9eedadedfbe" }
 num-bigint = { version = "0.4", features = ["rand"] }
 uuid = { version = "1.4.0", features = ["v1", "rng"] }
-serde = { version = "1.0", default-features = false, features = ["derive"] }
+serde = { version = "=1.0.203", default-features = false, features = ["derive"] }
+
 serde_json = "1.0"
 hyperplonk_benchmark = { git = "https://github.com/10to4/plonkish.git", branch = "main", package = "benchmark" }
 plonkish_backend = { git = "https://github.com/10to4/plonkish.git", branch = "main", package = "plonkish_backend" }