diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 279dd77..696c9df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
       - name: Set up conda environment
         shell: bash -l {0}
         run: |
-          python -m pip install --no-deps git+https://github.com/MITgcm/xmitgcm.git petitRADTRANS==2.4.9 prt-phasecurve
+          python -m pip install --no-deps molmass miepython git+https://github.com/MITgcm/xmitgcm.git petitRADTRANS==2.4.9 prt-phasecurve
           python -m pip install -e .
           conda list
       - name: Run Tests
@@ -78,7 +78,7 @@ jobs:
       - name: Set up conda environment
         shell: bash -l {0}
         run: |
-          python -m pip install --no-deps git+https://github.com/MITgcm/xmitgcm.git petitRADTRANS==2.4.9 prt-phasecurve        
+          python -m pip install --no-deps molmass miepython git+https://github.com/MITgcm/xmitgcm.git petitRADTRANS==2.4.9 prt-phasecurve        
           python -m pip install -e .
           conda list
       - name: Run Tests
diff --git a/ci/environment-3.10.yml b/ci/environment-3.10.yml
index ca77ecb..ba039e1 100644
--- a/ci/environment-3.10.yml
+++ b/ci/environment-3.10.yml
@@ -9,7 +9,7 @@ dependencies:
   - pytest-cov
   - matplotlib
   - astropy
-  - numpy==1.24.4
+  - numpy
   - scipy
   - setuptools
   - netcdf4
@@ -23,8 +23,6 @@ dependencies:
   - distlib
   - filelock
   - h5py
-  - miepython
-  - molmass
   - platformdirs
   - nodeenv 
   - pre-commit 
diff --git a/ci/environment-3.9.yml b/ci/environment-3.9.yml
index 320c2ce..23cbe8b 100644
--- a/ci/environment-3.9.yml
+++ b/ci/environment-3.9.yml
@@ -9,7 +9,7 @@ dependencies:
   - pytest-cov
   - matplotlib
   - astropy
-  - numpy==1.24.4
+  - numpy
   - scipy
   - setuptools
   - netcdf4
@@ -23,8 +23,6 @@ dependencies:
   - distlib
   - filelock
   - h5py
-  - miepython
-  - molmass
   - platformdirs
   - nodeenv 
   - pre-commit 
diff --git a/ci/environment-xarraymaster.yml b/ci/environment-xarraymaster.yml
index 3f99728..8218e78 100644
--- a/ci/environment-xarraymaster.yml
+++ b/ci/environment-xarraymaster.yml
@@ -9,7 +9,7 @@ dependencies:
   - pytest-cov
   - matplotlib
   - astropy
-  - numpy==1.24.4
+  - numpy
   - scipy
   - setuptools
   - netcdf4
@@ -23,8 +23,6 @@ dependencies:
   - distlib
   - filelock
   - h5py
-  - miepython
-  - molmass
   - platformdirs
   - nodeenv 
   - pre-commit