diff --git a/README.md b/README.md
index 0c6cf6a..a20a156 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ See [the documentation in the `doc` folder](doc/README.md)
 
 This originates from the classic Drupal `solr:8` image recipe used for a long time by Drupal users and compatible with `search_api_solr`.
 
-* It installs a [`.ddev/docker-compose.solr.yaml`](docker-compose.solr.yaml) using the `solr:8` docker image.
+* It installs a [`.ddev/docker-compose.solr.yaml`](docker-compose.solr.yaml) using the `solr:9` docker image.
 * A standard Drupal 9+ Solr configuration is included in [.ddev/solr/conf](solr/conf).
 * A [.ddev/docker-entrypoint-initdb.d/solr-configupdate.sh](solr/docker-entrypoint-initdb.d/solr-configupdate.sh) is included and mounted into the Solr container so that you can change Solr config in `.ddev/solr/conf` with just a `ddev restart`.
 
diff --git a/docker-compose.solr.yaml b/docker-compose.solr.yaml
index 6930aa8..4cd60eb 100644
--- a/docker-compose.solr.yaml
+++ b/docker-compose.solr.yaml
@@ -42,7 +42,7 @@ services:
         RUN sed -i '/X-Forwarded-/,/-->/ {/<!--/d; /-->/d}' /opt/solr/server/etc/jetty.xml
         USER solr
       args:
-        SOLR_BASE_IMAGE: ${SOLR_BASE_IMAGE:-solr:8}
+        SOLR_BASE_IMAGE: ${SOLR_BASE_IMAGE:-solr:9}
     restart: "no"
     # Solr is served from this port inside the container.
     expose: