diff --git a/.github/workflows/build-charm.yaml b/.github/workflows/build-charm.yaml
index 79713534..655d2040 100644
--- a/.github/workflows/build-charm.yaml
+++ b/.github/workflows/build-charm.yaml
@@ -22,16 +22,37 @@ jobs:
     steps:
       - uses: actions/checkout@v4.1.3
       - uses: canonical/setup-lxd@v0.1.1
+
+      - name: Get hash of the source
+        run: echo "SRC_HASH=${{ hashFiles('**/charms/**/*.yaml', '**/charms/**/*.py', '**/charms/**/requirements.txt') }}" >> $GITHUB_ENV
+
       - name: Extract charm name
         working-directory: ${{ inputs.working-directory }}
         run: echo "CHARM_NAME=$([ -f charmcraft.yaml ] && yq '.name' charmcraft.yaml || echo UNKNOWN)" >> $GITHUB_ENV
+
+      - name: Cache charm output
+        id: cache-charm
+        uses: actions/cache@v4
+        with:
+          path: ${{ inputs.working-directory }}packed/
+          key: ${{ runner.os}}-${{ env.CHARM_NAME }}-charm-${{ env.SRC_HASH }}
+
+      - name: Use cached charm
+        if: ${{ env.CHARM_NAME != 'UNKNOWN' && steps.cache-charm.outputs.cache-hit == 'true' }}
+        working-directory: ${{ inputs.working-directory }}/${{ matrix.path }}
+        run: |
+          echo "CHARM_FILE=$(ls packed/${{env.CHARM_NAME}}_*.charm)" >> $GITHUB_ENV
+
       - name: Pack charm
-        if: ${{ env.CHARM_NAME != 'UNKNOWN' && !cancelled() }}
+        if: ${{ env.CHARM_NAME != 'UNKNOWN' && !cancelled() && steps.cache-charm.outputs.cache-hit != 'true' }}
         working-directory: ${{ inputs.working-directory }}/${{ matrix.path }}
         run: |
           sudo snap install charmcraft --classic --channel latest/stable
           charmcraft pack -v
-          echo "CHARM_FILE=$(ls ${{env.CHARM_NAME}}_*.charm)" >> $GITHUB_ENV
+          mkdir -p packed
+          mv *.charm packed/
+          echo "CHARM_FILE=$(ls packed/${{env.CHARM_NAME}}_*.charm)" >> $GITHUB_ENV
+
       - name: Upload charm artifact
         if: ${{ env.CHARM_FILE != '' && !cancelled() }}
         uses: actions/upload-artifact@v4
diff --git a/charms/worker/k8s/requirements.txt b/charms/worker/k8s/requirements.txt
index 9acee428..eb134dd4 100644
--- a/charms/worker/k8s/requirements.txt
+++ b/charms/worker/k8s/requirements.txt
@@ -1,7 +1,10 @@
-ops >= 2.2.0
-cosl == 0.0.8
-pydantic == 1.*
-charm-lib-reconciler @ git+https://github.com/charmed-kubernetes/charm-lib-reconciler@main
-charm-lib-contextual-status @ git+https://github.com/charmed-kubernetes/charm-lib-contextual-status@main
-charm-lib-node-base @ git+https://github.com/charmed-kubernetes/layer-kubernetes-node-base@main#subdirectory=ops
-charm-lib-interface-external-cloud-provider @ git+https://github.com/charmed-kubernetes/charm-lib-interface-external-cloud-provider@main
+charm-lib-contextual-status @ git+https://github.com/charmed-kubernetes/charm-lib-contextual-status@255dd4a23defc16dcdac832306e5f460a0f1200c
+charm-lib-interface-external-cloud-provider @ git+https://github.com/charmed-kubernetes/charm-lib-interface-external-cloud-provider@e1c5fc69e98100a7d43c0ad5a7969bba1ecbcd40
+charm-lib-node-base @ git+https://github.com/charmed-kubernetes/layer-kubernetes-node-base@9b212854e768f13c26cc907bed51444e97e51b50#subdirectory=ops
+charm-lib-reconciler @ git+https://github.com/charmed-kubernetes/charm-lib-reconciler@f818cc30d1a22be43ffdfecf7fbd9c3fd2967502
+cosl==0.0.8
+ops==2.12.0
+pydantic==1.10.15
+PyYAML==6.0.1
+typing_extensions==4.11.0
+websocket-client==1.8.0