diff --git a/.ci/310.yaml b/.ci/310.yaml
index aa37d995..be3175d1 100644
--- a/.ci/310.yaml
+++ b/.ci/310.yaml
@@ -3,17 +3,18 @@ channels:
   - conda-forge
 dependencies:
   - python=3.10
-  - geopandas>=0.10.0
+  - geopandas
   - libpysal
+  - mapclassify
   - matplotlib
   - networkx
-  - numpy>=1.21
-  - pandas>=1.0.5
-  - scikit-learn>=0.22
-  - scipy>=1.3.2
+  - numpy
+  - pandas
+  - scikit-learn
+  - scipy
   - shapely
   - spaghetti
-  - tqdm>=4.27.0
+  - tqdm
   # testing
   - codecov
   - coverage
diff --git a/.ci/311-DEV.yaml b/.ci/311-DEV.yaml
index 8dc09972..333224d5 100644
--- a/.ci/311-DEV.yaml
+++ b/.ci/311-DEV.yaml
@@ -5,14 +5,15 @@ dependencies:
   - python=3.11
   - geopandas
   - libpysal
+  - mapclassify
   - matplotlib
   - networkx
-  - numpy>=1.21
-  - pandas>=1.0.5
-  - scikit-learn>=0.22
-  - scipy>=1.3.2
+  - numpy
+  - pandas
+  - scikit-learn
+  - scipy
   - spaghetti
-  - tqdm>=4.27.0
+  - tqdm
   # testing
   - codecov
   - coverage
diff --git a/.ci/311.yaml b/.ci/311.yaml
index de883154..d6e06e59 100644
--- a/.ci/311.yaml
+++ b/.ci/311.yaml
@@ -5,14 +5,15 @@ dependencies:
   - python=3.11
   - geopandas
   - libpysal
+  - mapclassify
   - matplotlib
   - networkx
-  - numpy>=1.21
-  - pandas>=1.0.5
-  - scikit-learn>=0.22
-  - scipy>=1.3.2
+  - numpy
+  - pandas
+  - scikit-learn
+  - scipy
   - spaghetti
-  - tqdm=>4.27.0
+  - tqdm
   # testing
   - codecov
   - coverage
diff --git a/.ci/38-MIN.yaml b/.ci/38-MIN.yaml
index 1cfd8844..7b0238f8 100644
--- a/.ci/38-MIN.yaml
+++ b/.ci/38-MIN.yaml
@@ -3,15 +3,15 @@ channels:
   - conda-forge
 dependencies:
   - python=3.8
-  - geopandas=0.10.0
+  - geopandas=0.10
   - libpysal
   - matplotlib
-  - networkx
+  - networkx=2.6
   - numpy=1.21
-  - pandas=1.0.5
-  - scikit-learn=0.22
-  - scipy=1.3.2
-  - shapely
+  - pandas=1.3
+  - scikit-learn=1.0
+  - scipy=1.7
+  - shapely=2.0
   - spaghetti
   # testing
   - codecov
diff --git a/.ci/39.yaml b/.ci/39.yaml
index a4917df1..e4a0e553 100644
--- a/.ci/39.yaml
+++ b/.ci/39.yaml
@@ -5,15 +5,15 @@ dependencies:
   - python=3.9
   - geopandas
   - libpysal
+  - mapclassify
   - matplotlib
   - networkx
-  - numpy>=1.21
-  - pandas>=1.0.5
-  - scikit-learn>=0.22
-  - scipy>=1.3.2
+  - numpy
+  - pandas
+  - scikit-learn
+  - scipy
   - shapely
   - spaghetti
-  - tqdm=4.27.0
   # testing
   - codecov
   - coverage
diff --git a/.github/workflows/build_docs.yml b/.github/workflows/build_docs.yml
index d40a6701..55852317 100644
--- a/.github/workflows/build_docs.yml
+++ b/.github/workflows/build_docs.yml
@@ -30,7 +30,7 @@
          uses: actions/checkout@v3
        
        - name: setup micromamba
-         uses: mamba-org/provision-with-micromamba@main
+         uses: mamba-org/setup-micromamba@v1
          with:
            environment-file: ${{ matrix.environment-file }}
            micromamba-version: 'latest'
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 1013e5d8..defc40db 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -15,8 +15,6 @@
      name: ${{ matrix.os }}, ${{ matrix.environment-file }}
      runs-on: ${{ matrix.os }}
      timeout-minutes: 30
-     env:
-       RUN_TEST: pytest spopt -v -r a -n auto --cov spopt --color yes --cov-report term-missing --cov-append --cov-report xml .
      strategy:
        matrix:
          os: [ubuntu-latest]
@@ -33,43 +31,39 @@
            - environment-file: .ci/311.yaml
              os: windows-latest
        fail-fast: false
-    
+
+     defaults:
+       run:
+         shell: bash -l {0}
+
      steps:
        - name: checkout repo
          uses: actions/checkout@v3
        
        - name: setup micromamba
-         uses: mamba-org/provision-with-micromamba@main
+         uses: mamba-org/setup-micromamba@v1
          with:
            environment-file: ${{ matrix.environment-file }}
            micromamba-version: 'latest'
-           channel-priority: 'flexible'
         
        ##############################################################################
        #- name: install pulp via pip
-       #  shell: bash -l {0}
-       #  run: pip install pulp
+       #  run: |
+       #    pip install pulp
+       #    pulptest
        ##############################################################################
        
        - name: environment info
-         shell: bash -l {0}
          run: |
            micromamba info
            micromamba list
        
        - name: spatial versions
-         shell: bash -l {0}
          run: 'python -c "import geopandas; geopandas.show_versions();"'
        
        - name: run tests - bash
-         shell: bash -l {0}
-         run: ${{ env.RUN_TEST }}
-         if: matrix.os != 'windows-latest'
-       
-       - name: run tests - powershell
-         shell: powershell
-         run: ${{ env.RUN_TEST }}
-         if: matrix.os == 'windows-latest'
+         run: |
+           pytest spopt -v -r a -n auto --cov spopt --color yes --cov-report term-missing --cov-append --cov-report xml .
        
        - name: codecov
          uses: codecov/codecov-action@v3
diff --git a/README.md b/README.md
index 9df9ca0a..04823d91 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,7 @@ All examples can be run interactively by launching this repository as a [![Binde
 - [scikit-learn](https://scikit-learn.org/stable/)
 - [geopandas](https://geopandas.org/)
 - [pulp](https://coin-or.github.io/pulp/)
+- [shapely](https://shapely.readthedocs.io/en/stable/)
 - [spaghetti](https://github.com/pysal/spaghetti)
 
 ## Installation
diff --git a/pyproject.toml b/pyproject.toml
index c5032eff..d389ec60 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,15 +30,16 @@ classifiers = [
 ]
 requires-python = ">=3.8"
 dependencies = [
-    "geopandas>=0.10.0",
+    "geopandas>=0.10",
     "libpysal",
     "mapclassify",
-    "networkx",
+    "networkx>=2.6",
     "numpy>=1.21",
-    "pandas>=1.0.5",
+    "pandas>=1.3,!=1.5.0",
     "pulp",
-    "scikit-learn>=0.22",
-    "scipy>=1.3.2",
+    "scikit-learn>=1.0",
+    "scipy>=1.7",
+    "shapely>=2",
     "spaghetti",
     "tqdm>=4.27.0",
 ]