diff --git a/cvrplib/list_names.py b/cvrplib/list_names.py
index 836f7dac..32ff2975 100644
--- a/cvrplib/list_names.py
+++ b/cvrplib/list_names.py
@@ -1,3 +1,4 @@
+import importlib.resources as pkg_resource
 from functools import lru_cache
 from typing import Optional
 
@@ -44,7 +45,7 @@ def list_names(
 
 @lru_cache()
 def _parse_instance_data():
-    with open("cvrplib/instance_data.csv", "r") as fi:
-        instances = [line.strip().split(",") for line in fi.readlines()]
+    fi = pkg_resource.read_text(__package__, "instance_data.csv")
+    instances = [line.strip().split(",") for line in fi.split()]
 
     return [{"name": inst[0], "n_customers": int(inst[1])} for inst in instances]
diff --git a/pyproject.toml b/pyproject.toml
index 2a2e25de..f1bcfc27 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cvrplib"
-version = "1.0.0"
+version = "0.1.1"
 description = "Python library for reading and downloading CVRPLIB instances."
 authors = ["Leon Lan <leon.lanyidong@gmail.com>"]
 license = "MIT"