diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index 235f217..e18dd6d 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: [3.8, 3.9, 3.10, 3.11]
+        python-version: ["3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/setup.py b/setup.py
index 81eca3d..dca8fb1 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,6 @@ setup(
         "pandas",
         "ipython",
         "tensorflow<=2.11.1",
-        "keras",
     ],
     packages=find_packages(exclude=[]),
     keywords=["pso", "tensorflow", "keras"],