diff --git a/rust/json-gen/Cargo.lock b/rust/json-gen/Cargo.lock
index e3f6e40c..3002704d 100644
--- a/rust/json-gen/Cargo.lock
+++ b/rust/json-gen/Cargo.lock
@@ -31,9 +31,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.9.1"
+version = "3.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4a45a46ab1f2412e53d3a0ade76ffad2025804294569aae387231a0cd6e0899"
+checksum = "0d261e256854913907f67ed06efbc3338dfe6179796deefc1ff763fc1aee5535"
 
 [[package]]
 name = "cardano-serialization-lib"