diff --git a/matcha/utils/generate_data_statistics.py b/matcha/utils/generate_data_statistics.py
index 49ed3c1..305d806 100644
--- a/matcha/utils/generate_data_statistics.py
+++ b/matcha/utils/generate_data_statistics.py
@@ -102,10 +102,8 @@ def main():
     log.info("Dataloader loaded! Now computing stats...")
     params = compute_data_statistics(data_loader, cfg["n_feats"])
     print(params)
-    json.dump(
-        params,
-        open(output_file, "w"),
-    )
+    with open(output_file, "w", encoding="utf-8") as dumpfile:
+        json.dump(params, dumpfile)
 
 
 if __name__ == "__main__":