diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 350feb1..25b16c5 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,12 +15,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           submodules: recursive
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
         with:
           go-version-file: go.mod
 
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 156975b..deef5f6 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           ssh-key: ${{ secrets.PUSH_KEY }}
           fetch-tags: true
@@ -49,7 +49,7 @@ jobs:
           exit 0
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3
 
       - name: Set up Docker Context for Buildx
         id: buildx-context
@@ -57,7 +57,7 @@ jobs:
           docker context create builders
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -65,12 +65,12 @@ jobs:
 
       - name: Set up Docker Buildx
         timeout-minutes: 5
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3
         with:
           version: latest
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
         with:
           go-version-file: go.mod
 
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 4d99cba..bd60f48 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           ssh-key: ${{ secrets.PUSH_KEY }}
           fetch-tags: true
@@ -89,7 +89,7 @@ jobs:
 
       - name: Build Changelog
         id: github_release
-        uses: mikepenz/release-changelog-builder-action@v5
+        uses: mikepenz/release-changelog-builder-action@e92187bd633e680ebfdd15961a7c30b2d097e7ad # v5
         with:
           mode: "PR"
           configurationJson: |
@@ -123,7 +123,7 @@ jobs:
 
       - name: Create GitHub release
         if: ${{ env.SKIP != 'true' }}
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2
         with:
           tag_name: ${{ env.version }}
           name: Release ${{ env.version }}
diff --git a/.github/workflows/reuse.yaml b/.github/workflows/reuse.yaml
index 328ee5b..46fe64c 100644
--- a/.github/workflows/reuse.yaml
+++ b/.github/workflows/reuse.yaml
@@ -6,6 +6,6 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: REUSE Compliance Check
-        uses: fsfe/reuse-action@v5
+        uses: fsfe/reuse-action@bb774aa972c2a89ff34781233d275075cbddf542 # v5
diff --git a/Dockerfile b/Dockerfile
index f61c245..2136fab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM docker.io/golang:1.23 AS builder
+FROM docker.io/golang:1.23@sha256:45c8837b16499b4e0e52b62d4cfba7bf04fc651b7d9265f95010fe0beaec2626 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 
@@ -24,7 +24,7 @@ COPY pkg/ pkg/
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
 RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/main.go
 
-FROM alpine:3.21.3
+FROM alpine:3.21.3@sha256:a8560b36e8b8210634f77d9f7f9efd7ffa463e380b75e2e74aff4511df3ef88c
 RUN apk add --no-cache docker-cli kind
 WORKDIR /
 COPY --from=builder /workspace/manager .