diff --git a/.github/workflows/github-ci.yml b/.github/workflows/github-ci.yml
index 0dbcd09..6b70af9 100644
--- a/.github/workflows/github-ci.yml
+++ b/.github/workflows/github-ci.yml
@@ -12,17 +12,19 @@ jobs:
   build-linux:
   
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
 
     steps:
     - uses: actions/checkout@v2
-    - name: Add conda to system path
-      run: |
-        # $CONDA is an environment variable pointing to the root of the miniconda directory
-        echo $CONDA/bin >> $GITHUB_PATH
-    - name: Install dependencies & package
-      run: |
-        conda env update --file environment.yml --name base
-        pip install .
+    - name: create environment with mamba
+      uses: conda-incubator/setup-miniconda@v2
+      with:
+        miniconda-version: 22.11.1
+        auto-activate-base: false
+        activate-environment: pacpac
+        environment-file: environment.yml
     - name: Lint with flake8
       run: |
         conda install flake8
diff --git a/Dockerfile b/Dockerfile
index 7ea7e6f..d20e7ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM frolvlad/alpine-miniconda3 as build
+FROM frolvlad/alpine-miniconda3:python3.7 as build
 
 WORKDIR pacpac
 COPY environment.yml setup.py ./
@@ -14,7 +14,7 @@ ENV PATH /opt/conda/envs/pacpac/bin:$PATH
 RUN pip install .
 
 ########## conda-pack bit to reduce image size
-RUN conda install conda-pack
+RUN conda install conda-pack==0.6.0
 
 # Use conda-pack to create a standalone enviornment in /venv
 RUN conda-pack -n pacpac -o /tmp/env.tar && \
@@ -25,7 +25,7 @@ RUN conda-pack -n pacpac -o /tmp/env.tar && \
 RUN /venv/bin/conda-unpack
 ##########
 
-FROM debian:buster AS runtime
+FROM debian:buster-20230919 AS runtime
 
 # Copy /venv from the previous stage
 COPY --from=build /venv /venv
diff --git a/environment.yml b/environment.yml
index 3a65fb8..0a3736a 100755
--- a/environment.yml
+++ b/environment.yml
@@ -16,4 +16,4 @@ dependencies:
     - pandarallel==1.5.2
     - pyfiglet==0.8.post1
     - typer==0.3.2
-    - protobuf==3.20
+    - protobuf==3.20
\ No newline at end of file