diff --git a/lib/src/commands/key.dart b/lib/src/commands/key.dart
index b25f5340..9ca570e5 100644
--- a/lib/src/commands/key.dart
+++ b/lib/src/commands/key.dart
@@ -20,23 +20,9 @@ class KeyCommand extends Command {
 
   changeSecret(File file, String secret) async {
     if (await file.exists()) {
-      bool foundSecret = false;
-      var sink = await file.openWrite(mode: FileMode.APPEND);
-
-      await for (var chunk in await file.openRead().transform(UTF8.decoder)) {
-        var lines = chunk.split('\n');
-
-        for (String line in lines) {
-          if (line.contains('jwt_secret:')) {
-            foundSecret = true;
-            sink.writeln('jwt_secret: $secret');
-          } else
-            sink.writeln(line);
-        }
-      }
-
-      if (!foundSecret) sink.writeln('jwt:secret: $secret');
-      await sink.close();
+      var contents = await file.readAsString();
+      contents = contents.replaceAll(new RegExp(r'jwt_secret:[^\n]+\n?'), '');
+      await file.writeAsString(contents.trim() + '\njwt_secret: $secret');
     }
   }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 185977ec..80f82d27 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: angel_cli
-version: 1.0.0-dev+14
+version: 1.0.0-dev+15
 description: Command-line tools for the Angel framework.
 environment:
   sdk: ">=1.19.0"