diff --git a/.github/workflows/verify-data.yml b/.github/workflows/verify-data.yml
index 6354ba0..fe98163 100644
--- a/.github/workflows/verify-data.yml
+++ b/.github/workflows/verify-data.yml
@@ -21,18 +21,31 @@ jobs:
           yamllint_strict: false
           yamllint_comment: false
 
-      - name: "Set up Python"
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.x"
-
       - name: "Install dependencies"
+        run: sudo apt-get update && sudo apt-get install -y g++-14 libyaml-cpp-dev nlohmann-json3-dev
+
+      - name: "Fetch json-schema-validator"
+        run: |
+          rm -rf json-schema-validator
+          git clone --depth 1 https://github.com/pboettch/json-schema-validator.git json-schema-validator
+
+      - name: "Build YAML validator"
         run: |
-          python3 -m pip install --upgrade pip
-          python3 -m pip install PyYAML jsonschema
+          g++-14 -std=c++23 -Wall -Wextra \
+            $(pkg-config --cflags yaml-cpp) \
+            $(pkg-config --cflags nlohmann_json) \
+            -Ijson-schema-validator/src \
+            -o validate_yaml_file \
+            validate_yaml_file.cpp \
+            json-schema-validator/src/json-uri.cpp \
+            json-schema-validator/src/json-validator.cpp \
+            json-schema-validator/src/json-schema-draft7.json.cpp \
+            json-schema-validator/src/json-patch.cpp \
+            $(pkg-config --libs yaml-cpp)
 
-      - name: "Verify features"
+      - name: "Validate feature files"
         run: |
           for file in features_c*.yaml; do
-            python3 verify_features.py "$file"
+            echo "Verifying: $file"
+            ./validate_yaml_file "$file"
           done
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4258f92
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+validate_yaml_file
diff --git a/validate_yaml_file.cpp b/validate_yaml_file.cpp
new file mode 100644
index 0000000..b0d78be
--- /dev/null
+++ b/validate_yaml_file.cpp
@@ -0,0 +1,81 @@
+// Copyright (c) Cem Dervis
+// SPDX-License-Identifier: CC0-1.0
+// This file is part of https://cppstat.dev.
+
+#include <nlohmann/json-schema.hpp>
+#include <nlohmann/json.hpp>
+#include <print>
+#include <yaml-cpp/yaml.h>
+
+using json = nlohmann::json;
+
+json yaml_to_json(const YAML::Node& node) {
+  if (node.IsNull()) {
+    return nullptr;
+  }
+  else if (node.IsScalar()) {
+    try {
+      return node.as<bool>();
+    } catch (...) {
+    }
+
+    try {
+      return node.as<int64_t>();
+    } catch (...) {
+    }
+
+    try {
+      return node.as<double>();
+    } catch (...) {
+    }
+
+    return node.as<std::string>();
+  }
+  else if (node.IsSequence()) {
+    auto arr = json::array();
+
+    for (const auto& item : node) {
+      arr.push_back(yaml_to_json(item));
+    }
+
+    return arr;
+  }
+  else if (node.IsMap()) {
+    auto obj = json::object();
+
+    for (const auto& kv : node) {
+      obj[kv.first.as<std::string>()] = yaml_to_json(kv.second);
+    }
+
+    return obj;
+  }
+
+  return nullptr;
+}
+
+int main(int argc, char* argv[]) {
+  if (argc < 2) {
+    std::println(stderr, "Usage: {} <data_file.yaml>", argv[0]);
+    return EXIT_FAILURE;
+  }
+
+  try {
+    auto schema_yaml = YAML::LoadFile("features.schema.yaml");
+    auto schema      = yaml_to_json(schema_yaml);
+
+    auto data_yaml = YAML::LoadFile(argv[1]);
+    auto data      = yaml_to_json(data_yaml);
+
+    auto val = nlohmann::json_schema::json_validator();
+    val.set_root_schema(schema);
+    val.validate(data);
+
+    std::println("Verification successful: {}", argv[1]);
+
+    return EXIT_SUCCESS;
+  } catch (const std::exception& e) {
+    std::println(stderr, "Verification failed: {}", argv[1]);
+    std::println(stderr, "Error: {}", e.what());
+    return EXIT_FAILURE;
+  }
+}
diff --git a/verify_features.py b/verify_features.py
deleted file mode 100644
index c58825f..0000000
--- a/verify_features.py
+++ /dev/null
@@ -1,35 +0,0 @@
-import yaml
-import jsonschema
-import sys
-
-def validate_yaml(schema_file, data_file):
-    try:
-        with open(schema_file, 'r') as f:
-            schema = yaml.safe_load(f)
-        
-        with open(data_file, 'r') as f:
-            data = yaml.safe_load(f)
-            
-        jsonschema.validate(instance=data, schema=schema)
-        print(f"Verification successful: {data_file}")
-        return True
-    except jsonschema.exceptions.ValidationError as e:
-        print(f"Verification failed: {data_file}")
-        print(f"Error: {e.message}")
-        print(f"Path: {' -> '.join(map(str, e.path))}")
-        return False
-    except Exception as e:
-        print(f"An error occurred: {e}")
-        return False
-
-if __name__ == "__main__":
-    schema_path = "features.schema.yaml"
-    
-    if len(sys.argv) < 2:
-        print("Usage: python3 verify_features.py <data_file.yaml>")
-        sys.exit(1)
-        
-    data_path = sys.argv[1]
-    success = validate_yaml(schema_path, data_path)
-    if not success:
-        sys.exit(1)