diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 93ff34bb..969ce612 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,8 +15,8 @@
   # `image`
   # yamllint disable rule:line-length
   image_commitlint: &image_commitlint 'techneg/ci-commitlint:v1.1.86@sha256:8c5ba8332790247b0bdd0e0f7a87fee169aa5405197a9cca4e79be30e45b0269'
-  image_dindruby: &image_dindruby 'techneg/ci-docker-python-ruby:v2.2.45'
-  image_dindrubybionic: &image_dindrubybionic 'techneg/ci-docker-python-ruby:v2.2.45'
+  image_dindruby: &image_dindruby 'techneg/ci-docker-python-ruby:v2.2.55@sha256:1e4685e62a274c227c9cb08c80750e9961834777b53bb9e7c5faf6c0d8a07d1e'
+  image_dindrubybionic: &image_dindrubybionic 'techneg/ci-docker-python-ruby:v2.2.55@sha256:1e4685e62a274c227c9cb08c80750e9961834777b53bb9e7c5faf6c0d8a07d1e'
   image_precommit: &image_precommit 'techneg/ci-pre-commit:v2.4.20@sha256:16ef5422c57c3ac998e15993e49ef76a6ff116b1faeecf61bb53309510f2a0b9'
   image_rubocop: &image_rubocop 'pipelinecomponents/rubocop:latest'
   image_semantic-release: &image_semanticrelease 'myii/ssf-semantic-release:15.14'