diff --git a/src/persist/fileAdapter.ts b/src/persist/fileAdapter.ts
index 8bf87d5..e6b7f8c 100644
--- a/src/persist/fileAdapter.ts
+++ b/src/persist/fileAdapter.ts
@@ -71,7 +71,7 @@ export class FileAdapter implements Adapter {
     gList.forEach((n) => {
       n.policy.forEach((m) => {
         result += n.key + ', ';
-        result += arrayToString(m);
+        result += arrayToString(m.map((element) => this.escapeCsv(element)));
         result += '\n';
       });
     });
@@ -80,6 +80,14 @@ export class FileAdapter implements Adapter {
     return true;
   }
 
+  private escapeCsv(value: string): string {
+    // If the value contains a comma, wrap it in double quotes and escape any existing double quotes
+    if (value.includes(',')) {
+      return `"${value.replace(/"/g, '""')}"`;
+    }
+    return value;
+  }
+
   private async savePolicyFile(text: string): Promise<void> {
     (this.fs ? this.fs : mustGetDefaultFileSystem()).writeFileSync(this.filePath, text);
   }