diff --git a/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/SourcesGenerator.java b/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/SourcesGenerator.java
index 59e6ba3..9cfc4bd 100644
--- a/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/SourcesGenerator.java
+++ b/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/SourcesGenerator.java
@@ -68,7 +68,7 @@ public class SourcesGenerator {
 
 	private static final Logger logger = LoggerFactory.getLogger(SourcesGenerator.class);
 	private static final boolean OVERRIDE_ALL_NULLABLE_METHODS = false;
-	private static final String SERIAL_VERSION = "1";
+	private static final String SERIAL_VERSION = "2";
 
 	private final DataModel dataModel;
 
diff --git a/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataInitializer.java b/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataInitializer.java
index 493853d..21526b8 100644
--- a/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataInitializer.java
+++ b/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataInitializer.java
@@ -1,9 +1,8 @@
 package it.cavallium.data.generator;
 
-import java.io.IOException;
 import org.jetbrains.annotations.NotNull;
 
 public interface DataInitializer<T> {
 
-	@NotNull T initialize() throws IOException;
+	@NotNull T initialize();
 }
diff --git a/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataUpgrader.java b/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataUpgrader.java
index d6e3f61..3355383 100644
--- a/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataUpgrader.java
+++ b/data-generator-runtime/src/main/java/it/cavallium/data/generator/DataUpgrader.java
@@ -1,9 +1,8 @@
 package it.cavallium.data.generator;
 
-import java.io.IOException;
 import org.jetbrains.annotations.NotNull;
 
 public interface DataUpgrader<T, U> {
 
-	@NotNull U upgrade(@NotNull T data) throws IOException;
+	@NotNull U upgrade(@NotNull T data);
 }
diff --git a/data-generator-runtime/src/main/java/it/cavallium/data/generator/nativedata/UpgradeUtil.java b/data-generator-runtime/src/main/java/it/cavallium/data/generator/nativedata/UpgradeUtil.java
index bc8c2a8..ee5b2f3 100644
--- a/data-generator-runtime/src/main/java/it/cavallium/data/generator/nativedata/UpgradeUtil.java
+++ b/data-generator-runtime/src/main/java/it/cavallium/data/generator/nativedata/UpgradeUtil.java
@@ -1,13 +1,11 @@
 package it.cavallium.data.generator.nativedata;
 
 import it.cavallium.data.generator.DataUpgrader;
-import java.io.IOException;
 import java.util.List;
 
 public class UpgradeUtil {
 	@SuppressWarnings("unchecked")
-	public static <A, B> List<B> upgradeArray(List<A> from, DataUpgrader<A, B> upgrader)
-			throws IOException {
+	public static <A, B> List<B> upgradeArray(List<A> from, DataUpgrader<A, B> upgrader) {
 		Object[] array;
 		if (from instanceof ImmutableWrappedArrayList<A> immutableWrappedArrayList) {
 			array = immutableWrappedArrayList.a;
@@ -20,7 +18,7 @@ public class UpgradeUtil {
 		return (ImmutableWrappedArrayList<B>) new ImmutableWrappedArrayList<>(array);
 	}
 
-	public static <A, B> B upgradeNullable(A nullableValue, DataUpgrader<A, B> upgrader) throws IOException {
+	public static <A, B> B upgradeNullable(A nullableValue, DataUpgrader<A, B> upgrader) {
 		if (nullableValue == null) {
 			return null;
 		} else {
diff --git a/data-generator-runtime/src/test/java/it/cavallium/data/generator/nativedata/TestInt52Serializer.java b/data-generator-runtime/src/test/java/it/cavallium/data/generator/nativedata/TestInt52Serializer.java
index d954cde..ef0799b 100644
--- a/data-generator-runtime/src/test/java/it/cavallium/data/generator/nativedata/TestInt52Serializer.java
+++ b/data-generator-runtime/src/test/java/it/cavallium/data/generator/nativedata/TestInt52Serializer.java
@@ -4,7 +4,6 @@ import it.cavallium.stream.SafeByteArrayInputStream;
 import it.cavallium.stream.SafeByteArrayOutputStream;
 import it.cavallium.stream.SafeDataInputStream;
 import it.cavallium.stream.SafeDataOutputStream;
-import java.io.IOException;
 import org.jetbrains.annotations.Nullable;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
@@ -12,7 +11,7 @@ import org.junit.jupiter.api.Test;
 public class TestInt52Serializer {
 
 	@Test
-	public void testInt52Serialization() throws IOException {
+	public void testInt52Serialization() {
 		for (int i = 0; i <= 300; i++) {
 			testInt52Serialization(i);
 		}
@@ -21,7 +20,7 @@ public class TestInt52Serializer {
 		testInt52Serialization(999619292661L);
 	}
 
-	public void testInt52Serialization(long n) throws IOException {
+	public void testInt52Serialization(long n) {
 		var serializer = new Int52Serializer();
 		byte[] out;
 		try (var baos = new SafeByteArrayOutputStream()) {
@@ -37,7 +36,7 @@ public class TestInt52Serializer {
 	}
 
 	@Test
-	public void testInt52OptionalSerialization() throws IOException {
+	public void testInt52OptionalSerialization() {
 		testInt52OptionalSerialization(null);
 		for (long i = 0; i <= 300; i++) {
 			testInt52OptionalSerialization(i);
@@ -45,7 +44,7 @@ public class TestInt52Serializer {
 		testInt52OptionalSerialization(0xF_FF_FF_FF_FF_FF_FFL);
 	}
 
-	public void testInt52OptionalSerialization(@Nullable Long n) throws IOException {
+	public void testInt52OptionalSerialization(@Nullable Long n) {
 		var serializer = new NullableInt52Serializer();
 		byte[] out;
 		try (var baos = new SafeByteArrayOutputStream()) {