diff --git a/README.md b/README.md
index b28ceb9..eb3f93f 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,6 @@ relative-to-alias-resolver --project <path-to-project> --tsconfig <path-to-tscon
 - `-t, --tsconfig <path>`: The path to the `tsconfig.json` file to use for the project. Defaults to `./tsconfig.json`.
 - `-d, --dry-run`: Run the command in dry run mode. Defaults to `true`.
 - `-i, --ignore <patterns>`: A comma-separated list of regex patterns for paths to ignore. Defaults to `["node_modules"]`.
-- `-c, --concurrency <number>`: The number of promises to allow at once when editing the project. Defaults to `5`.
 
 #### Example
 
diff --git a/src/createFileList.ts b/src/createFileList.ts
index a49864d..0bda85e 100644
--- a/src/createFileList.ts
+++ b/src/createFileList.ts
@@ -12,7 +12,7 @@ import { Options } from "@/index";
  */
 export default async function createFileList(
   projectPath: string,
-  ignorePatterns: string[]
+  ignorePatterns: string[],
 ): Promise<string[]> {
   const fileList: string[] = [];
 
diff --git a/src/index.ts b/src/index.ts
index 117af62..aee12b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,9 +24,9 @@ export default async function main(options: Options) {
   // 4. Create a list of all the files in the project
   const fileList = await createFileList(
     options.project,
-    options.ignoreDirectories
+    options.ignoreDirectories,
   );
 
   // 5. process the files
-  await processFiles(fileList, paths);
+  await processFiles(fileList, paths, options.dryRun);
 }
diff --git a/src/processFiles.ts b/src/processFiles.ts
index e16ebb3..c62d240 100644
--- a/src/processFiles.ts
+++ b/src/processFiles.ts
@@ -5,7 +5,8 @@ import { resolve } from "node:path";
 
 export default async function processFiles(
   fileList: string[],
-  paths: { [key: string]: string[] }
+  paths: { [key: string]: string[] },
+  dryRun: boolean
 ) {
   async function processFile(filePath: string) {
     // 1. read the file contents
@@ -43,7 +44,9 @@ export default async function processFiles(
     const modifiedContents = recast.print(ast).code;
 
     // 5. write the modified contents back to the file
-    await fs.writeFile(filePath, modifiedContents);
+    if (!dryRun) {
+      await fs.writeFile(filePath, modifiedContents);
+    }
   }
 
   await Promise.all(fileList.map(processFile));