diff --git a/solidcpp/Cargo.lock b/solidcpp/Cargo.lock
index 70a6701..f8767a8 100644
--- a/solidcpp/Cargo.lock
+++ b/solidcpp/Cargo.lock
@@ -11,6 +11,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
+
 [[package]]
 name = "anstream"
 version = "0.6.15"
@@ -278,6 +284,12 @@ dependencies = [
  "static_assertions",
 ]
 
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -331,9 +343,14 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.15.0"
+version = "0.15.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
+checksum = "84b26c544d002229e640969970a2e74021aadf6e2f96372b9c58eff97de08eb3"
+dependencies = [
+ "allocator-api2",
+ "equivalent",
+ "foldhash",
+]
 
 [[package]]
 name = "heck"
@@ -671,6 +688,7 @@ dependencies = [
  "clap",
  "ethereum-types",
  "globwalk",
+ "hashbrown",
  "hex",
  "regex",
  "serde_json",
diff --git a/solidcpp/Cargo.toml b/solidcpp/Cargo.toml
index a38a901..8487fc4 100644
--- a/solidcpp/Cargo.toml
+++ b/solidcpp/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.1.2"
 edition = "2021"
 
 [dependencies]
+hashbrown = "0.15.1"
 byteorder = "1.5.0"
 clap = { version = "4.0.3", features = ["derive"] }
 ethereum-types = "0.15.1"