diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f560a56a..43688089 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -28,8 +28,8 @@ jobs:
           - "3.2"
           - "3.3"
         datastore:
-          - "elasticsearch:8.15.1"
-          - "opensearch:2.16.0"
+          - "elasticsearch:8.15.3"
+          - "opensearch:2.17.1"
           - "opensearch:2.7.0"
         include:
           # We have 4 build parts. The "primary" one is `run_each_gem_spec`, and we need that to be run on
@@ -38,13 +38,13 @@ jobs:
           # configuration here.
           - build_part: "run_misc_checks"
             ruby: "3.3"
-            datastore: "elasticsearch:8.15.1"
+            datastore: "elasticsearch:8.15.3"
           - build_part: "run_most_specs_with_vcr"
             ruby: "3.3"
-            datastore: "elasticsearch:8.15.1"
+            datastore: "elasticsearch:8.15.3"
           - build_part: "run_specs_file_by_file"
             ruby: "3.3"
-            datastore: "elasticsearch:8.15.1"
+            datastore: "elasticsearch:8.15.3"
 
     steps:
       - uses: actions/checkout@v4
diff --git a/elasticgraph-local/lib/elastic_graph/local/tested_datastore_versions.yaml b/elasticgraph-local/lib/elastic_graph/local/tested_datastore_versions.yaml
index b8ec1a63..1f41e468 100644
--- a/elasticgraph-local/lib/elastic_graph/local/tested_datastore_versions.yaml
+++ b/elasticgraph-local/lib/elastic_graph/local/tested_datastore_versions.yaml
@@ -2,7 +2,7 @@
 # This file determines the versions the ElasticGraph CI build tests against, and is also
 # used to provide the default versions offered by the `elasticgraph-local` rake tasks.
 elasticsearch:
-- 8.15.1 # latest version as of 2024-09-06.
+- 8.15.3 # latest version as of 2024-10-29.
 opensearch:
-- 2.16.0 # latest version as of 2024-09-06.
+- 2.17.1 # latest version as of 2024-10-29.
 - 2.7.0 # lowest version ElasticGraph currently supports