diff --git a/README.md b/README.md
index 3fd5e32..59c4658 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ By using the native scalafmt image, this action typically completes in two to th
 - uses: jrouly/scalafmt-native-action@v2
   with:
     # Optional: Which version of scalafmt-native to use.
-    # Default: 3.5.8
+    # Default: read from .scalafmt.conf, otherwise '3.5.8'
     version: '3.5.8'
 
     # Optional: Arguments to be passed to scalafmt-native.
@@ -47,3 +47,9 @@ Inspired by the design and usage patterns of [olafurpg/setup-scala](https://gith
 Similar to [openlawteam/scalafmt-ci](https://github.com/openlawteam/scalafmt-ci) but does not pin the version of the action to a specific version of scalafmt.
 
 Similar to [AvaPL/scalafmt-native-formatter](https://github.com/AvaPL/scalafmt-native-formatter) but leverages the GitHub actions TypeScript SDK for logging and testing.
+
+## Releasing
+
+Merging a branch to `main` triggers the release job from the CI workflow.
+This job builds a release candidate and force pushes a commit to the `release` branch.
+Once ready to be released, a GitHub release can be created off that branch.
diff --git a/action.yml b/action.yml
index 16854fc..832db63 100644
--- a/action.yml
+++ b/action.yml
@@ -4,7 +4,6 @@ author: jrouly
 inputs:
   version:
     description: The scalafmt-native version to run.
-    default: 3.5.8
     required: false
   arguments:
     description: Arguments to pass to scalafmt-native.
diff --git a/package-lock.json b/package-lock.json
index 88cc680..4e15dc1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "version": "0.0.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@actions/core": "^1.9.0"
+        "@actions/core": "^1.10.0"
       },
       "devDependencies": {
         "@types/jest": "^27.0.1",
@@ -28,11 +28,12 @@
       }
     },
     "node_modules/@actions/core": {
-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.9.0.tgz",
-      "integrity": "sha512-5pbM693Ih59ZdUhgk+fts+bUWTnIdHV3kwOSr+QIoFHMLg7Gzhwm0cifDY/AG68ekEJAkHnQVpcy4f6GjmzBCA==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.10.0.tgz",
+      "integrity": "sha512-2aZDDa3zrrZbP5ZYg159sNoLRb61nQ7awl5pSvIq5Qpj81vwDzdMRKzkWJGJuwVvWpvZKx7vspJALyvaaIQyug==",
       "dependencies": {
-        "@actions/http-client": "^2.0.1"
+        "@actions/http-client": "^2.0.1",
+        "uuid": "^8.3.2"
       }
     },
     "node_modules/@actions/http-client": {
@@ -6519,6 +6520,14 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/v8-compile-cache": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz",
@@ -6871,11 +6880,12 @@
   },
   "dependencies": {
     "@actions/core": {
-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.9.0.tgz",
-      "integrity": "sha512-5pbM693Ih59ZdUhgk+fts+bUWTnIdHV3kwOSr+QIoFHMLg7Gzhwm0cifDY/AG68ekEJAkHnQVpcy4f6GjmzBCA==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.10.0.tgz",
+      "integrity": "sha512-2aZDDa3zrrZbP5ZYg159sNoLRb61nQ7awl5pSvIq5Qpj81vwDzdMRKzkWJGJuwVvWpvZKx7vspJALyvaaIQyug==",
       "requires": {
-        "@actions/http-client": "^2.0.1"
+        "@actions/http-client": "^2.0.1",
+        "uuid": "^8.3.2"
       }
     },
     "@actions/http-client": {
@@ -11806,6 +11816,11 @@
         "punycode": "^2.1.0"
       }
     },
+    "uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
+    },
     "v8-compile-cache": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz",
diff --git a/package.json b/package.json
index 202fe84..9c83c97 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   "author": "jrouly",
   "license": "Apache-2.0",
   "dependencies": {
-    "@actions/core": "^1.9.0"
+    "@actions/core": "^1.10.0"
   },
   "devDependencies": {
     "@types/jest": "^27.0.1",
diff --git a/src/main.ts b/src/main.ts
index 218aaa0..88b7483 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -3,7 +3,7 @@ import {scalafmt} from './scalafmt'
 
 async function run(): Promise<void> {
   try {
-    const version: string = core.getInput('version', {required: true})
+    const version: string = core.getInput('version')
     const args: string = core.getInput('arguments', {required: true})
 
     await scalafmt(version, args)
diff --git a/src/scalafmt.ts b/src/scalafmt.ts
index 07f4bae..9749fcf 100644
--- a/src/scalafmt.ts
+++ b/src/scalafmt.ts
@@ -1,4 +1,5 @@
 import * as core from '@actions/core'
+import * as fs from 'fs'
 import * as os from 'os'
 import * as path from 'path'
 import * as process from 'child_process'
@@ -10,8 +11,21 @@ const homedir = os.homedir()
 const bin = path.join(homedir, 'bin')
 const scalafmtPath = path.join(bin, 'scalafmt-native')
 
+const defaultVersion = '3.5.8'
+
 export async function scalafmt(version: string, args: string): Promise<string> {
   await setup()
+  if (!version && fs.existsSync('./.scalafmt.conf')) {
+    // If version is unspecified, read it from .scalafmt.conf (if present).
+    const conf = fs.readFileSync('./.scalafmt.conf', 'utf8')
+    const v = conf.match('version\\s+=\\s+(\\S+)')
+    if (v && v.length >= 2) {
+      version = v[1]
+    }
+  }
+  if (!version) {
+    version = defaultVersion
+  }
   await install(version)
   return await execute(args)
 }