diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d5b3fb268e..6f44514eb7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: alpine
+image: alpine:3.22.1@sha256:4bcff63911fcb4448bd4fdacec207030997caf25e9bea4045fa6c8c44de311d1
 
 variables:
   REGISTRY: registry.ddbuild.io
diff --git a/.gitlab/build-deploy/.gitlab-ci.yml b/.gitlab/build-deploy/.gitlab-ci.yml
index 7845952d43..1d96d52390 100644
--- a/.gitlab/build-deploy/.gitlab-ci.yml
+++ b/.gitlab/build-deploy/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: alpine
+image: alpine:3.22.1@sha256:4bcff63911fcb4448bd4fdacec207030997caf25e9bea4045fa6c8c44de311d1
 
 variables:
   # Generated by https://gitlab.ddbuild.io/DataDog/java-profiler/-/jobs/1600939090
@@ -346,7 +346,7 @@ notify-slack-on-success:
     - job: deploy-artifact
       artifacts: false
   when: on_success
-  image: registry.ddbuild.io/slack-notifier:latest
+  image: registry.ddbuild.io/slack-notifier:v91289620-4ec922a-latest@sha256:06b24f392ccc383d371c72001520a254edef523bc0bfdc445f487106107b4202
   tags: ["arch:amd64"]
   script:
     - .gitlab/build-deploy/notify_channel.sh success $(cat version.txt)
@@ -360,7 +360,7 @@ notify-slack-on-failure:
     - job: deploy-artifact
       artifacts: true
   when: on_failure
-  image: registry.ddbuild.io/slack-notifier:latest
+  image: registry.ddbuild.io/slack-notifier:v91289620-4ec922a-latest@sha256:06b24f392ccc383d371c72001520a254edef523bc0bfdc445f487106107b4202
   tags: ["arch:amd64"]
   script:
     - .gitlab/build-deploy/notify_channel.sh alert $(cat version.txt)
diff --git a/.gitlab/jdk-integration/.gitlab-ci.yml b/.gitlab/jdk-integration/.gitlab-ci.yml
index 4fe94b90fd..81fde8867c 100644
--- a/.gitlab/jdk-integration/.gitlab-ci.yml
+++ b/.gitlab/jdk-integration/.gitlab-ci.yml
@@ -47,7 +47,7 @@ test-with-jdk:
 notify-slack:
   stage: notify
   when: on_failure
-  image: registry.ddbuild.io/slack-notifier:latest
+  image: registry.ddbuild.io/slack-notifier:v91289620-4ec922a-latest@sha256:06b24f392ccc383d371c72001520a254edef523bc0bfdc445f487106107b4202
   tags: ["arch:amd64"]
   script:
     - .gitlab/jdk-integration/notify_channel.sh "${JDK_VERSION}" "${DEBUG_LEVEL}" "${HASH}"
diff --git a/.gitlab/reliability/.gitlab-ci.yml b/.gitlab/reliability/.gitlab-ci.yml
index d18428983c..54ab9cff18 100644
--- a/.gitlab/reliability/.gitlab-ci.yml
+++ b/.gitlab/reliability/.gitlab-ci.yml
@@ -121,7 +121,7 @@ notify-slack:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
       when: on_failure
     - when: never
-  image: registry.ddbuild.io/slack-notifier:latest
+  image: registry.ddbuild.io/slack-notifier:v91289620-4ec922a-latest@sha256:06b24f392ccc383d371c72001520a254edef523bc0bfdc445f487106107b4202
   tags: [ "arch:amd64" ]
   needs:
     - get-versions