diff --git a/plaintext_encoder.services.yml b/plaintext_encoder.services.yml
index 4c07d9854f207bf01f09c9ff38f8dba3c83a73e4..118a547573078cb787fc5d085253bda35640a4d8 100644
--- a/plaintext_encoder.services.yml
+++ b/plaintext_encoder.services.yml
@@ -2,4 +2,4 @@ services:
   plaintext_encoder.encoder.plaintext:
     class: Drupal\plaintext_encoder\Encoder\PlaintextEncoder
     tags:
-      - { name: encoder, format: plaintext }
+      - { name: encoder, format: txt }
diff --git a/src/Encoder/PlaintextEncoder.php b/src/Encoder/PlaintextEncoder.php
index aee472035e07933b624d4fe20b631da9782c7773..e4849855ee9abfe05711acc504a8e5d7d1bdecda 100644
--- a/src/Encoder/PlaintextEncoder.php
+++ b/src/Encoder/PlaintextEncoder.php
@@ -16,7 +16,7 @@ class PlaintextEncoder implements EncoderInterface, DecoderInterface {
    *
    * @var string
    */
-  protected static $format = 'plaintext';
+  protected static $format = 'txt';
 
   /**
    * Constructs the class.