diff --git a/src/main/java/com/github/JanLoebel/jsonschemavalidation/advice/JsonValidationRequestBodyControllerAdvice.java b/src/main/java/com/github/JanLoebel/jsonschemavalidation/advice/JsonValidationRequestBodyControllerAdvice.java
index 31f09c5..747f7e9 100644
--- a/src/main/java/com/github/JanLoebel/jsonschemavalidation/advice/JsonValidationRequestBodyControllerAdvice.java
+++ b/src/main/java/com/github/JanLoebel/jsonschemavalidation/advice/JsonValidationRequestBodyControllerAdvice.java
@@ -85,7 +85,7 @@ private String toString(HttpInputMessage inputMessage) throws IOException {
     }
 
     private InputStream fromString(String body) {
-        return new ByteArrayInputStream(body.getBytes());
+        return new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8));
     }
 
     private HttpInputMessage buildHttpInputMessage(String body, HttpHeaders httpHeaders) {