diff --git a/requirements.txt b/requirements.txt
index cb64ec18..01eafd95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,34 +1,34 @@
-certifi~=2023.7.22
-charset-normalizer~=3.2.0
-cloudpickle~=2.2.1
-contourpy~=1.1.0
-cycler~=0.11.0
-dill~=0.3.7
-Farama-Notifications~=0.0.4
-fonttools~=4.42.0
+certifi>=2023.7.22
+charset-normalizer>=3.2.0
+cloudpickle>=2.2.1
+contourpy>=1.1.0
+cycler>=0.11.0
+dill>=0.3.7
+Farama-Notifications>=0.0.4
+fonttools>=4.42.0
 gym==0.9.4
 gymnasium~=0.29.1
-idna~=3.4
-iniconfig~=2.0.0
-kiwisolver~=1.4.4
-matplotlib~=3.7.2
-multiprocess~=0.70.15
-numpy~=1.25.0
-packaging~=23.1
-pandas~=2.0.3
-pathos~=0.3.1
-Pillow~=10.0.0
-pluggy~=1.2.0
-pox~=0.3.3
-ppft~=1.7.6.7
-pyglet~=2.0.9
-pyparsing~=3.0.9
-pytest~=7.4.0
-python-dateutil~=2.8.2
-pytz~=2023.3
-requests~=2.31.0
-scipy~=1.11.0
-six~=1.16.0
-typing_extensions~=4.7.1
-tzdata~=2023.3
-urllib3~=2.0.4
+idna>=3.4
+iniconfig>=2.0.0
+kiwisolver>=1.4.4
+matplotlib>=3.7.2
+multiprocess>=0.70.15
+numpy>=1.25.0
+packaging>=23.1
+pandas>=2.0.3
+pathos>=0.3.1
+Pillow>=10.0.0
+pluggy>=1.2.0
+pox>=0.3.3
+ppft>=1.7.6.7
+pyglet>=2.0.9
+pyparsing>=3.0.9
+pytest>=7.4.0
+python-dateutil>=2.8.2
+pytz>=2023.3
+requests>=2.31.0
+scipy>=1.11.0
+six>=1.16.0
+typing_extensions>=4.7.1
+tzdata>=2023.3
+urllib3>=2.0.4
diff --git a/setup.py b/setup.py
index 4d28594c..08393948 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@ def parse_requirements(filename):
 
 setup(
     name="simglucose",
-    version="0.2.7",
+    version="0.2.8",
     description="A Type-1 Diabetes Simulator as a Reinforcement Learning Environment in OpenAI gym or rllab (python implementation of UVa/Padova Simulator)",
     url="https://github.com/jxx123/simglucose",
     author="Jinyu Xie",