diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 8b80ca3f..9321877f 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -23,7 +23,7 @@ jobs:
         environment-file: ./environment.yml
         environment-name: ocsmesh-env
         extra-specs: |
-          python=3.*
+          python=3.10
     - name: Install dependencies
       shell: bash -l {0}
       run: |
diff --git a/.github/workflows/functional_test.yml b/.github/workflows/functional_test.yml
index 78d2fec1..7e54be27 100644
--- a/.github/workflows/functional_test.yml
+++ b/.github/workflows/functional_test.yml
@@ -28,7 +28,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10' ]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.github/workflows/functional_test_2.yml b/.github/workflows/functional_test_2.yml
index 8add4c3c..2430832e 100644
--- a/.github/workflows/functional_test_2.yml
+++ b/.github/workflows/functional_test_2.yml
@@ -28,7 +28,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10' ]
 
     steps:
     - name: Checkout 
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 80ab2ab4..846f7fb3 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -31,7 +31,7 @@ jobs:
         environment-file: ./environment.yml
         environment-name: ocsmesh-env
         extra-specs: |
-          python=3.*
+          python=3.10
     - name: Install dependencies
       shell: bash -l {0}
       run: |
diff --git a/pyproject.toml b/pyproject.toml
index 6e60e156..d0886b8c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ maintainers = [
 description = "Package to generate computational unstructured meshes from planetary modeling."
 license = {file = "LICENSE"}
 readme = "README.md"
-requires-python = '>=3.9' # 3.8 not supported by scipy
+requires-python = '>=3.9, <3.11' # 3.8 -> scipy, 3.11 -> triangle
 dependencies = [
     "colored-traceback", "fiona", "geopandas",
     "jigsawpy", "matplotlib", "netCDF4", "numba",