diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index d68ec90..4b53551 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -17,4 +17,4 @@ regex = "1"
 cc = "1.0"
 
 [dev-dependencies]
-serde_json = "1.0"
+serde_json = "=1.0.151"