diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1aaa020..73d70de 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -30,7 +30,7 @@ jobs:
           - 5672:5672
           - 15672:15672
       mongodb:
-        image: mongo:3.7
+        image: mongo:7.0.11
         env:
           MONGO_INITDB_ROOT_USERNAME: guest
           MONGO_INITDB_ROOT_PASSWORD: guest
diff --git a/README.md b/README.md
index 45774ba..d3426b9 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ $ docker run -it --rm --name mongo \
     -p 27017:27017 \
     -e MONGO_INITDB_ROOT_USERNAME=guest \
     -e MONGO_INITDB_ROOT_PASSWORD=guest \
-    mongo:7.0.5
+    mongo:7.0.11
 ```
 
 Now create a virtual environment, and install the server:
diff --git a/compose.yml b/compose.yml
index f94c304..fbd8b57 100644
--- a/compose.yml
+++ b/compose.yml
@@ -1,7 +1,9 @@
 services:
 
   mongodb:
-    image: mongo:7.0.5
+    image: mongo:7.0.11
+    expose:
+      - ${MONGO_PORT}
     environment:
       MONGO_INITDB_ROOT_USERNAME: ${MONGO_INITDB_ROOT_USERNAME}
       MONGO_INITDB_ROOT_PASSWORD: ${MONGO_INITDB_ROOT_PASSWORD}
@@ -16,7 +18,7 @@ services:
         source: mongodb
         target: /data/db:Z
     healthcheck:
-      test: ["CMD", "mongosh", "localhost:27017/test", "--quiet"]
+      test: ["CMD", "mongosh", "localhost:${MONGO_PORT}/test", "--quiet"]
 
   sdx-lc:
     image: sdx-lc
@@ -26,7 +28,7 @@ services:
       - 8080:8080
     depends_on:
       mongodb:
-        # Anther condition is `service_healthy`, and it will require
+        # Another condition is `service_healthy`, and it will require
         # the `healthcheck` above.
         condition: service_started
     environment:
@@ -36,7 +38,7 @@ services:
       - SDXLC_PORT=${SDXLC_PORT}
       # MongoDB settings.  When using compose, we connect to the
       # mongodb service started by compose.
-      - MONGODB_CONNSTRING=mongodb://${MONGO_INITDB_ROOT_USERNAME}:${MONGO_INITDB_ROOT_PASSWORD}@mongodb:27017/
+      - MONGODB_CONNSTRING=mongodb://${MONGO_INITDB_ROOT_USERNAME}:${MONGO_INITDB_ROOT_PASSWORD}@mongodb:${MONGO_PORT}/
       - DB_NAME=${DB_NAME}
       - DB_CONFIG_TABLE_NAME=${DB_CONFIG_TABLE_NAME}
       # Message queue settings.
diff --git a/tox.ini b/tox.ini
index 299a8e9..d5e8e38 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ ports =
 healthcheck_cmd = rabbitmq-diagnostics -q ping
 
 [docker:mongo]
-image = mongo:7.0.5
+image = mongo:7.0.11
 
 ports =
     27017:27017/tcp