diff --git a/src/main/java/dev/pcvolkmer/mv64e/mtb/Converter.java b/src/main/java/dev/pcvolkmer/mv64e/mtb/Converter.java
index 5260392..ee58b24 100644
--- a/src/main/java/dev/pcvolkmer/mv64e/mtb/Converter.java
+++ b/src/main/java/dev/pcvolkmer/mv64e/mtb/Converter.java
@@ -66,7 +66,7 @@ public class Converter {
     private static void instantiateMapper() {
         ObjectMapper mapper = new ObjectMapper();
         mapper.findAndRegisterModules();
-        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
         mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
         SimpleModule module = new SimpleModule();
         module.addDeserializer(Date.class, new JsonDeserializer<>() {