diff --git a/src/main/java/com/pfefferminzia/petinsurance/tariffs/TariffConfiguration.java b/src/main/java/com/pfefferminzia/petinsurance/tariffs/TariffConfiguration.java
index a2ef905..5e3e6f3 100644
--- a/src/main/java/com/pfefferminzia/petinsurance/tariffs/TariffConfiguration.java
+++ b/src/main/java/com/pfefferminzia/petinsurance/tariffs/TariffConfiguration.java
@@ -23,8 +23,7 @@ public record TariffConfiguration(Map<String, BigDecimal> animalBaseSums,
             throw new IllegalArgumentException("Tierart darf nicht leer oder null sein.");
         }
 
-        String normalizedKey = species.trim().toUpperCase();
-        BigDecimal baseSum = animalBaseSums.get(normalizedKey);
+        BigDecimal baseSum = animalBaseSums.get(species);
 
         if (baseSum == null) {
             throw new IllegalArgumentException(