diff --git a/rust/ares/Cargo.lock b/rust/ares/Cargo.lock
index 950e6fc..cfa6b4f 100644
--- a/rust/ares/Cargo.lock
+++ b/rust/ares/Cargo.lock
@@ -20,6 +20,7 @@ dependencies = [
  "either",
  "ibig",
  "intmap",
+ "json",
  "lazy_static",
  "libc",
  "memmap",
@@ -322,6 +323,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "json"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "078e285eafdfb6c4b434e0d31e8cfcb5115b651496faca5749b88fafd4f23bfd"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -748,4 +755,4 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30b31594f29d27036c383b53b59ed3476874d518f0efb151b27a4c275141390e"
 dependencies = [
  "tap",
-]
\ No newline at end of file
+]
diff --git a/rust/ares/Cargo.toml b/rust/ares/Cargo.toml
index 22c28c3..7f7866f 100644
--- a/rust/ares/Cargo.toml
+++ b/rust/ares/Cargo.toml
@@ -20,6 +20,7 @@ criterion = "0.4"
 either = "1.9.0"
 ibig = { path = "../ibig-rs" }
 intmap = "1.1.0"
+json = "0.12.4"
 lazy_static = "1.4.0"
 libc = "0.2.126"
 memmap = "0.7.0"