diff --git a/examples/agent.py b/examples/agent.py
index e5b501a..9a7e33e 100644
--- a/examples/agent.py
+++ b/examples/agent.py
@@ -1,5 +1,5 @@
 from programlib import Program
-import gym
+import gymnasium as gym
 
 mountain_car_solver = """
 while True:
diff --git a/programlib/agent.py b/programlib/agent.py
index 27ba021..2a7e5d9 100644
--- a/programlib/agent.py
+++ b/programlib/agent.py
@@ -1,4 +1,4 @@
-import gym
+import gymnasium as gym
 import numpy as np
 
 def decode_action(action_space, action):
diff --git a/pyproject.toml b/pyproject.toml
index da76b90..02ea841 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "programlib"
-version = "9.0.2"
+version = "9.0.3"
 description = "Programs as Objects"
 authors = ["Vadim Liventsev <dev@vadim.me>"]
 license = "MIT"
@@ -14,7 +14,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.8"
 pexpect = "^4.8.0"
-gym = "^0.26.2"
+gymnasium = " >=0.0.0"
 numpy = "^1.24.2"
 pyte = "^0.8.0"
 contextlib-chdir = {version = "^1.0.2", python = "<3.11"}