diff --git a/.github/workflows/cicd_deploy.yml b/.github/workflows/cicd_deploy.yml
index 9728eba..bea78c1 100644
--- a/.github/workflows/cicd_deploy.yml
+++ b/.github/workflows/cicd_deploy.yml
@@ -77,7 +77,7 @@ jobs:
 
       # See https://github.com/marketplace/actions/setup-micromamba
       - name: setup-micromamba
-        uses: mamba-org/setup-micromamba@v1.4.3
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
           environment-file: environment.yml
           environment-name: pdaltools  # activate the environment
diff --git a/.github/workflows/cicd_full.yml b/.github/workflows/cicd_full.yml
index e1754b3..b0a6033 100644
--- a/.github/workflows/cicd_full.yml
+++ b/.github/workflows/cicd_full.yml
@@ -58,7 +58,7 @@ jobs:
 
       # See https://github.com/marketplace/actions/setup-micromamba
       - name: setup-micromamba
-        uses: mamba-org/setup-micromamba@v1.4.3
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
           environment-file: environment.yml
           environment-name: pdaltools  # activate the environment
diff --git a/.github/workflows/cicd_light.yml b/.github/workflows/cicd_light.yml
index a77f55d..eb3f3f4 100644
--- a/.github/workflows/cicd_light.yml
+++ b/.github/workflows/cicd_light.yml
@@ -16,11 +16,11 @@ jobs:
 
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # See https://github.com/marketplace/actions/setup-micromamba
       - name: setup-micromamba
-        uses: mamba-org/setup-micromamba@v1.4.3
+        uses: mamba-org/setup-micromamba@v1.9.0
         with:
           environment-file: environment.yml
           environment-name: pdaltools  # activate the environment