diff --git a/.github/workflows/docker-ghcr.yml b/.github/workflows/docker-ghcr.yml
index 2638c93..a2bbd1f 100644
--- a/.github/workflows/docker-ghcr.yml
+++ b/.github/workflows/docker-ghcr.yml
@@ -8,6 +8,7 @@ on:
 permissions:
   contents: read
   packages: write
+  id-token: write
 
 env:
   REGISTRY: ghcr.io
@@ -46,6 +47,9 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
 
+      - name: Install cosign
+        uses: sigstore/cosign-installer@v3
+
       - name: Login to GHCR
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v4
@@ -81,3 +85,15 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.tags.outputs.full }}
 
+      - name: Sign images
+        if: github.event_name != 'pull_request'
+        env:
+          TAGS_MINIMAL: ${{ steps.tags.outputs.minimal }}
+          TAGS_BUSYBOX: ${{ steps.tags.outputs.busybox }}
+          TAGS_FULL: ${{ steps.tags.outputs.full }}
+        run: |
+          IFS=',' read -ra TAGS <<< "$TAGS_MINIMAL,$TAGS_BUSYBOX,$TAGS_FULL"
+          for tag in "${TAGS[@]}"; do
+            cosign sign --yes "$tag"
+          done
+
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index dbc54f3..5464775 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -7,6 +7,7 @@ on:
 
 permissions:
   contents: read
+  id-token: write
 
 env:
   REGISTRY: docker.io
@@ -44,6 +45,9 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
 
+      - name: Install cosign
+        uses: sigstore/cosign-installer@v3
+
       - name: Login to Docker Hub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v4
@@ -77,3 +81,15 @@ jobs:
           platforms: linux/amd64,linux/arm64,linux/arm/v7,ppc64le
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.tags.outputs.full }}
+
+      - name: Sign images
+        if: github.event_name != 'pull_request'
+        env:
+          TAGS_MINIMAL: ${{ steps.tags.outputs.minimal }}
+          TAGS_BUSYBOX: ${{ steps.tags.outputs.busybox }}
+          TAGS_FULL: ${{ steps.tags.outputs.full }}
+        run: |
+          IFS=',' read -ra TAGS <<< "$TAGS_MINIMAL,$TAGS_BUSYBOX,$TAGS_FULL"
+          for tag in "${TAGS[@]}"; do
+            cosign sign --yes "$tag"
+          done