diff --git a/README.md b/README.md
index e17f4a6..197bd65 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ jobs:
         node-version: ${{ matrix.node-version }}
 
     - name: Start Redis
-      uses: supercharge/redis-github-action@1.2.0
+      uses: supercharge/redis-github-action@1.3.0
       with:
         redis-version: ${{ matrix.redis-version }}
 
@@ -68,6 +68,33 @@ jobs:
 ```
 
 
+### Using Redis on a Custom Port
+You can start the Redis instance on a custom port using the `redis-port` input:
+
+```yaml
+name: Run tests
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x]
+        redis-version: [4, 5, 6]
+
+    steps:
+    - name: Start Redis
+      uses: supercharge/redis-github-action@1.3.0
+      with:
+        redis-version: ${{ matrix.redis-version }}
+        redis-port: 12345
+
+    - name: …
+```
+
+
 ## License
 MIT © [Supercharge](https://superchargejs.com)
 
diff --git a/action.yml b/action.yml
index e349371..d78491e 100644
--- a/action.yml
+++ b/action.yml
@@ -10,9 +10,13 @@ inputs:
     description: 'Redis version to use'
     required: false
     default: 'latest'
-
+  redis-port:
+    description: 'Redis port to use and expose'
+    required: false
+    default: 6379
 runs:
   using: 'docker'
   image: 'Dockerfile'
   args:
     - ${{ inputs.redis-version }}
+    - ${{ inputs.redis-port }}
diff --git a/start-redis.sh b/start-redis.sh
index 2897f67..cd9e385 100644
--- a/start-redis.sh
+++ b/start-redis.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 REDIS_VERSION=$1
+REDIS_PORT=$2
 
 if [ -z "$REDIS_VERSION" ]; then
   echo "Missing Redis version in the [redis-version] input. Received value: $REDIS_VERSION"
@@ -9,4 +10,4 @@ if [ -z "$REDIS_VERSION" ]; then
 fi
 
 echo "Starting single-node Redis instance"
-docker run --name redis --publish 6379:6379 --detach redis:$REDIS_VERSION
+docker run --name redis --publish $REDIS_PORT:6379 --detach redis:$REDIS_VERSION