diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 695496a..b4777db 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
-image: "docker:latest"
+image: "docker:latest@sha256:7d85d0eda291f1a7ab6df4a9d1802b5ad4cf9145a088bd11188c78dcb5c7392b"
 
 services:
-  - "docker:dind"
+  - "docker:dind@sha256:7d85d0eda291f1a7ab6df4a9d1802b5ad4cf9145a088bd11188c78dcb5c7392b"
 
 before_script:
   - "docker login -u \"$CI_REGISTRY_USER\" -p \"$CI_REGISTRY_PASSWORD\" $CI_REGISTRY"
diff --git a/Dockerfile b/Dockerfile
index e0c6d3b..4cd4202 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.14-alpine
+FROM python:3.14-alpine@sha256:5a824eb82cc75361f98611f3cfc5091ea33f10a6ccea4d4ebdabbc523b9a1614
 ARG BUILD_DATE
 ARG VCS_REF
 ARG VERSION