diff --git a/Dockerfile b/Dockerfile
index d2aff7a..6d2a923 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.20 as builder
+FROM golang:1.20@sha256:bfc60723228b88180b1e15872eb435cf7e6d8199eae9be77c8dfd8f8079343df as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests
@@ -19,7 +19,7 @@ RUN  CGO_ENABLED=0 GOOS=linux go build -a -o manager main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM registry.access.redhat.com/ubi8/ubi-minimal
+FROM registry.access.redhat.com/ubi8/ubi-minimal@sha256:288239021a429a311233d73a7d91b0a1dd889ab7bbc247d913e1b5726e25354a
 WORKDIR /
 COPY --from=builder /workspace/manager .
 USER 65532:65532
diff --git a/ci.Dockerfile b/ci.Dockerfile
index 1c17792..935335a 100644
--- a/ci.Dockerfile
+++ b/ci.Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.access.redhat.com/ubi8/ubi-minimal
+FROM registry.access.redhat.com/ubi8/ubi-minimal@sha256:288239021a429a311233d73a7d91b0a1dd889ab7bbc247d913e1b5726e25354a
 WORKDIR /
 COPY bin/manager .
 USER 65532:65532
diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml
index a813e45..f60dfd1 100644
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@@ -13,4 +13,4 @@ kind: Kustomization
 images:
 - name: controller
   newName: quay.io/redhat-cop/cert-utils-operator
-  newTag: latest
+  newTag: latest@sha256:0290e7b2800a5aa8eb57b0268908f2a20a93b16403c76df4c61021048161d6ff