diff --git a/.github/workflows/api-spec.yml b/.github/workflows/api-spec.yml
index b53a1d8..93e3072 100644
--- a/.github/workflows/api-spec.yml
+++ b/.github/workflows/api-spec.yml
@@ -38,7 +38,7 @@ jobs:
         run: |
           docker network create frontend
           # The spec export only needs PHP — pull phpfpm alone and run it as a
-          # one-off (--no-deps skips mariadb/rabbit), not the whole stack.
+          # one-off (--no-deps skips mariadb), not the whole stack.
           docker compose pull --quiet phpfpm
           docker compose run --rm --no-deps phpfpm composer install --no-interaction
 
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index b43bd59..16e48a2 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -23,8 +23,8 @@ jobs:
       - name: Start docker compose setup and install site
         run: |
           docker network create frontend
-          # API tests need PHP + Elasticsearch only (not mariadb/rabbit/nginx/mail);
-          # --no-deps keeps phpfpm's mariadb/rabbit dependencies from starting.
+          # API tests need PHP + Elasticsearch only (not mariadb/nginx/mail);
+          # --no-deps keeps phpfpm's mariadb dependency from starting.
           docker compose pull --quiet phpfpm elasticsearch
           docker compose up --detach --wait --no-deps phpfpm elasticsearch
           docker compose exec -T phpfpm composer install --no-interaction
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e7cd97..4581655 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ See [keep a changelog] for information about writing changes to this log.
 
 ## [Unreleased]
 
+- [PR-72](https://github.com/itk-dev/event-database-api/pull/72)
+  Update Elasticsearch to 8.19.23 and remove the unused RabbitMQ service
 - [PR-71](https://github.com/itk-dev/event-database-api/pull/71)
   Require PHP 8.5 and apply the Rector PHP 8.5 rules
 
diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index 9928b01..b61c9dc 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -2,21 +2,6 @@ services:
   phpfpm:
     networks:
       - frontend
-    depends_on:
-      # - elasticsearch
-      - rabbit
-
-  rabbit:
-    image: rabbitmq:3.12.4-management-alpine
-    networks:
-      - app
-      - frontend
-    ports:
-      - "15672"
-    environment:
-      - RABBITMQ_DEFAULT_USER=user
-      - RABBITMQ_DEFAULT_PASS=password
-      - RABBITMQ_ERLANG_COOKIE='d53f319cd7376f8f840aaf9889f315ab
 
   nginx:
     environment:
@@ -32,7 +17,7 @@ services:
       - "traefik.http.routers.${COMPOSE_PROJECT_NAME}.rule=Host(`${COMPOSE_DOMAIN}`) && (PathPrefix(`${APP_PATH_PREFIX}`) || PathPrefix(`/_wdt`) || PathPrefix(`/_profiler`))"
 
   elasticsearch:
-    image: elasticsearch:8.19.18
+    image: elasticsearch:8.19.23
     networks:
       - app
       - frontend