diff --git a/.github/workflows/conda-build.yml b/.github/workflows/conda-build.yml
index c18dba23..968595be 100644
--- a/.github/workflows/conda-build.yml
+++ b/.github/workflows/conda-build.yml
@@ -20,15 +20,15 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { conda_build_yml: linux_64_numpy1.20python3.8.____cpython,   os: ubuntu-latest,  conda-build-args: '' }
-          - { conda_build_yml: linux_64_numpy1.20python3.9.____cpython,   os: ubuntu-latest,  conda-build-args: '' }
-          - { conda_build_yml: linux_64_numpy1.23python3.11.____cpython,  os: ubuntu-latest,  conda-build-args: '' }
-          - { conda_build_yml: osx_64_numpy1.20python3.9.____cpython,     os: macos-latest,   conda-build-args: '' }
-          - { conda_build_yml: osx_64_numpy1.23python3.11.____cpython,    os: macos-latest,   conda-build-args: '' }
-          - { conda_build_yml: osx_arm64_numpy1.20python3.8.____cpython,  os: macos-latest,   conda-build-args: ' --no-test' }
-          - { conda_build_yml: osx_arm64_numpy1.21python3.10.____cpython, os: macos-latest,   conda-build-args: ' --no-test' }
-          - { conda_build_yml: win_64_numpy1.20python3.8.____cpython,     os: windows-latest, conda-build-args: '' }
-          - { conda_build_yml: win_64_numpy1.23python3.11.____cpython,    os: windows-latest, conda-build-args: '' }
+          - { conda_build_yml: linux_64_numpy1.20python3.8.____cpython,   os: ubuntu-latest,  conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: linux_64_numpy1.20python3.9.____cpython,   os: ubuntu-latest,  conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: linux_64_numpy1.23python3.11.____cpython,  os: ubuntu-latest,  conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: osx_64_numpy1.20python3.9.____cpython,     os: macos-latest,   conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: osx_64_numpy1.23python3.11.____cpython,    os: macos-latest,   conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: osx_arm64_numpy1.20python3.8.____cpython,  os: macos-latest,   conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge --no-test' }
+          - { conda_build_yml: osx_arm64_numpy1.21python3.10.____cpython, os: macos-latest,   conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge --no-test' }
+          - { conda_build_yml: win_64_numpy1.20python3.8.____cpython,     os: windows-latest, conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
+          - { conda_build_yml: win_64_numpy1.23python3.11.____cpython,    os: windows-latest, conda-build-args: ' -c conda-forge/label/tabmat_dev -c conda-forge' }
     steps:
       - name: Checkout branch
         uses: actions/checkout@v3
diff --git a/.github/workflows/daily.yml b/.github/workflows/daily.yml
index 0a6c2bcc..1b7f62c3 100644
--- a/.github/workflows/daily.yml
+++ b/.github/workflows/daily.yml
@@ -44,7 +44,7 @@ jobs:
           done
           echo Install tabmat nightly
           micromamba remove -y --force tabmat
-          pip install git+https://github.com/Quantco/tabmat
+          pip install git+https://github.com/Quantco/tabmat@tabmat-v4
       - name: Install repository
         shell: bash -el {0}
         run: pip install --no-use-pep517 --no-deps --disable-pip-version-check -e .
diff --git a/conda.recipe/meta.yaml b/conda.recipe/meta.yaml
index 79bee267..eb5356c8 100644
--- a/conda.recipe/meta.yaml
+++ b/conda.recipe/meta.yaml
@@ -35,7 +35,7 @@ requirements:
     - pandas
     - scikit-learn >=0.23
     - scipy
-    - tabmat >=3.1.0
+    - tabmat >=4.0.0a
 
 test:
   requires:
diff --git a/environment-benchmark.yml b/environment-benchmark.yml
index 6c189af5..3dd449de 100644
--- a/environment-benchmark.yml
+++ b/environment-benchmark.yml
@@ -1,5 +1,6 @@
 name: glum
 channels:
+  - conda-forge/label/tabmat_dev
   - conda-forge
   - nodefaults
 dependencies:
diff --git a/environment.yml b/environment.yml
index caf38614..0aa7c240 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,5 +1,6 @@
 name: glum
 channels:
+  - conda-forge/label/tabmat_dev
   - conda-forge
   - nodefaults
 dependencies:
@@ -8,7 +9,7 @@ dependencies:
   - libblas>=0=*mkl  # comment this line out for macOS arm64
   - numexpr
   - pandas>=0.21
-  - tabmat>=3.1.0
+  - tabmat>=4.0.0a
   - scikit-learn>=0.23
   - scipy
   - tqdm
diff --git a/setup.py b/setup.py
index edc063f3..016f12c3 100644
--- a/setup.py
+++ b/setup.py
@@ -85,7 +85,7 @@
         "pandas",
         "scikit-learn>=0.23",
         "scipy",
-        "tabmat>=3.1.0",
+        "tabmat>=4.0.0a",
     ],
     entry_points=None
     if os.environ.get("CONDA_BUILD")