diff --git a/pom.xml b/pom.xml
index 9c00eb4..40be7ee 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
     <groupId>eu.ztsh</groupId>
     <artifactId>large-file-reading-challenge</artifactId>
     <name>Large File Reading Challenge</name>
-    <version>1.0.0</version>
+    <version>1.0.0-SNAPSHOT</version>
 
     <properties>
         <!-- encoding -->
diff --git a/src/main/java/eu/ztsh/lfr/core/impl/TemperaturesServiceImpl.java b/src/main/java/eu/ztsh/lfr/core/impl/TemperaturesServiceImpl.java
index e3c608c..fa350fa 100644
--- a/src/main/java/eu/ztsh/lfr/core/impl/TemperaturesServiceImpl.java
+++ b/src/main/java/eu/ztsh/lfr/core/impl/TemperaturesServiceImpl.java
@@ -30,7 +30,7 @@ public class TemperaturesServiceImpl implements TemperaturesService {
                 Thread.currentThread().interrupt();
             }
         }
-        return averages.get().getOrDefault(city.toLowerCase(), List.of());
+        return averages.get().get(city);
     }
 
     @EventListener(FileProcessedEvent.class)
diff --git a/src/main/java/eu/ztsh/lfr/core/impl/files/FileLoadingService.java b/src/main/java/eu/ztsh/lfr/core/impl/files/FileLoadingService.java
index 500d03f..31c124d 100644
--- a/src/main/java/eu/ztsh/lfr/core/impl/files/FileLoadingService.java
+++ b/src/main/java/eu/ztsh/lfr/core/impl/files/FileLoadingService.java
@@ -79,9 +79,7 @@ public class FileLoadingService {
                 .map(line -> {
                     try {
                         var parts = line.split(";");
-                        return new DataRow(parts[0].toLowerCase(),
-                            Integer.parseInt(parts[1].split("-")[0]),
-                            Double.parseDouble(parts[2]));
+                        return new DataRow(parts[0], Integer.parseInt(parts[1].split("-")[0]), Double.parseDouble(parts[2]));
                     } catch (Exception e) {
                         throw new FileProcessingException("Error in line %s".formatted(line), e);
                     }
diff --git a/src/test/java/eu/ztsh/lfr/core/impl/files/FileLoadingServiceTest.java b/src/test/java/eu/ztsh/lfr/core/impl/files/FileLoadingServiceTest.java
index 86ca75c..8561e2f 100644
--- a/src/test/java/eu/ztsh/lfr/core/impl/files/FileLoadingServiceTest.java
+++ b/src/test/java/eu/ztsh/lfr/core/impl/files/FileLoadingServiceTest.java
@@ -29,7 +29,7 @@ class FileLoadingServiceTest {
             .publishEvent(captor.capture());
         var averages = captor.getValue().averages();
         assertThat(averages).hasSize(1);
-        var list = averages.get("warszawa");
+        var list = averages.get("Warszawa");
         assertThat(list).hasSize(1);
         assertThat(list.getFirst()).satisfies(item -> {
             assertThat(item.getYear()).isEqualTo("2018");