diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1def555..41736f3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,6 +34,7 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install surfaces flake8 pytest
           python -m pip install .
+          python -m pip install --upgrade pandas # surfaces install pandas < 2
 
       - name: Lint with flake8
         run: |
diff --git a/gradient_free_optimizers/optimizers/smb_opt/smbo.py b/gradient_free_optimizers/optimizers/smb_opt/smbo.py
index fe81a05..8d18feb 100644
--- a/gradient_free_optimizers/optimizers/smb_opt/smbo.py
+++ b/gradient_free_optimizers/optimizers/smb_opt/smbo.py
@@ -34,7 +34,7 @@ def init_warm_start_smbo(self, search_data):
         if search_data is not None:
             # filter out nan and inf
             warm_start_smbo = search_data[
-                ~search_data.isin([np.nan, np.inf, -np.inf]).any(1)
+                ~search_data.isin([np.nan, np.inf, -np.inf]).any(axis=1)
             ]
 
             # filter out elements that are not in search space
diff --git a/requirements.txt b/requirements.txt
index 9b71807..2469f71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 scipy <2.0.0
 numpy >=1.18.1, <2.0.0
-pandas <2.0.0
+pandas
 scikit-learn >=0.21, !=0.23.*
 tqdm >=4.48.0, <5.0.0
\ No newline at end of file