diff --git a/.github/workflows/build_workflow.yml b/.github/workflows/build_workflow.yml
index 76e6c48a..121b3a61 100644
--- a/.github/workflows/build_workflow.yml
+++ b/.github/workflows/build_workflow.yml
@@ -64,6 +64,10 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2
         with:
           activate-environment: zppy_dev
+	  miniforge-variant: Mambaforge
+          miniforge-version: latest
+          use-mamba: true
+          mamba-version: "*"
           environment-file: conda/dev.yml
           channel-priority: strict
           auto-update-conda: true
@@ -117,8 +121,7 @@ jobs:
       # Using pip for Sphinx dependencies because it takes too long to reproduce a conda environment (~10 secs vs. 3-4 mins)
       - name: Install Dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install sphinx==5.2.3 sphinx_rtd_theme==1.0.0 sphinx-multiversion==0.2.4 docutils==0.16
+          mamba install -y sphinx==5.2.3 sphinx_rtd_theme==1.0.0 sphinx-multiversion==0.2.4 docutils==0.16
       - name: Build Sphinx Docs
         run: |
           cd docs
diff --git a/.github/workflows/release_workflow.yml b/.github/workflows/release_workflow.yml
index 1102578e..9c05750f 100644
--- a/.github/workflows/release_workflow.yml
+++ b/.github/workflows/release_workflow.yml
@@ -37,8 +37,7 @@ jobs:
       # Using pip for Sphinx dependencies because it takes too long to reproduce a conda environment (~10 secs vs. 3-4 mins)
       - name: Install Dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install sphinx==5.2.3 sphinx_rtd_theme==1.0.0 sphinx-multiversion==0.2.4 docutils==0.16
+          mamba install -y sphinx==5.2.3 sphinx_rtd_theme==1.0.0 sphinx-multiversion==0.2.4 docutils==0.16
 
       - name: Build Sphinx Docs
         run: |
diff --git a/conda/dev.yml b/conda/dev.yml
index 883f10e1..40281e0d 100644
--- a/conda/dev.yml
+++ b/conda/dev.yml
@@ -27,9 +27,8 @@ dependencies:
   # =================
   - sphinx=5.2.3
   - sphinx_rtd_theme=1.0.0
+  - sphinx-multiversion==0.2.4
   # Need to pin docutils because 0.17 has a bug with unordered lists
   # https://github.com/readthedocs/sphinx_rtd_theme/issues/1115
   - docutils=0.16
-  - pip:
-      - sphinx-multiversion==0.2.4
 prefix: /opt/miniconda3/envs/zppy_dev
diff --git a/setup.py b/setup.py
index bb5feb92..be1f9279 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,6 @@ def package_files(directory, prefixes, extensions):
     author_email="forsyth2@llnl.gov, golaz1@llnl.gov",
     description="Post-processing software for E3SM",
     python_requires=">=3.6",
-    intall_requires=["configobj>=5.0.0,<6.0.0", "jinja2>=2.0.0"],
     packages=find_packages(include=["zppy", "zppy.*"]),
     package_data={"": data_files},
     entry_points={"console_scripts": ["zppy=zppy.__main__:main"]},