diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d23e06db0f..7ce70d88b9 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -125,8 +125,8 @@ jobs:
       # installs the extra RMS conda dependencies
       - name: Add RMS dependencies
         run: |
-          conda install -c conda-forge julia=1.9.1 pyjulia>=0.6 
-          conda install -c rmg pyrms diffeqpy
+          mamba install -c conda-forge julia=1.9.1 pyjulia>=0.6 
+          mamba install -c rmg pyrms diffeqpy
 
       # list the environment for debugging purposes
       - name: mamba info
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 9460b59164..1da6623fdc 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -39,8 +39,8 @@ jobs:
       # installs the extra RMS conda dependencies
       - name: Add RMS dependencies
         run: |
-          conda install -c conda-forge julia=1.9.1 pyjulia>=0.6 
-          conda install -c rmg pyrms diffeqpy
+          mamba install -c conda-forge julia=1.9.1 pyjulia>=0.6 
+          mamba install -c rmg pyrms diffeqpy
 
       - name: Install sphinx
         run: mamba install -y sphinx