diff --git a/requirements.txt b/requirements.txt
index eae21b5..2cd3460 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,5 +13,5 @@ pysb>=1.11
 pytest>=6.2
 scikit-learn>=0.24
 scipy>=1.5
-sympy==1.5
+sympy==1.11
 tqdm>=4.56
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 4ec039a..ad5ea89 100644
--- a/setup.py
+++ b/setup.py
@@ -73,7 +73,7 @@ def finalize_options(self):
                               include_dirs=py_inc)]
 
 install_requires = ['pysb', 'matplotlib', 'anytree', 'scikit-learn', 'pydot', 'tqdm',
-                    'editdistance', 'pandas', 'networkx', 'numpy', 'sympy==1.5']
+                    'editdistance', 'pandas', 'networkx', 'numpy', 'sympy==1.11']
 
 this_directory = os.path.abspath(os.path.dirname(__file__))
 with open(os.path.join(this_directory, 'README.md'), 'r') as f: