diff --git a/src/main/java/de/bund/digitalservice/a2j/service/subscriber/CallbackVerificationFilter.java b/src/main/java/de/bund/digitalservice/a2j/service/subscriber/CallbackVerificationFilter.java
index 8dd1ffb..abd52fb 100644
--- a/src/main/java/de/bund/digitalservice/a2j/service/subscriber/CallbackVerificationFilter.java
+++ b/src/main/java/de/bund/digitalservice/a2j/service/subscriber/CallbackVerificationFilter.java
@@ -43,8 +43,8 @@ protected void doFilterInternal(
     String requestBody =
         new String(wrappedRequest.getContentAsByteArray(), request.getCharacterEncoding());
 
-    ValidationResult result = senderClient
-        .validateCallback(
+    ValidationResult result =
+        senderClient.validateCallback(
             request.getHeader("callback-authentication"),
             Long.parseLong(request.getHeader("callback-timestamp")),
             requestBody,