diff --git a/docs/customization.md b/docs/customization.md
index c4c36bf782f..a7be58f96b9 100644
--- a/docs/customization.md
+++ b/docs/customization.md
@@ -601,6 +601,13 @@ Example:
 java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -g java -i modules/openapi-generator/src/test/resources/3_0/enableKeepOnlyFirstTagInOperation_test.yaml -o /tmp/java-okhttp/ --openapi-normalizer REMOVE_X_INTERNAL=true
 ```
 
+- `NORMALIZER_CLASS`: Set to full classname of a class extending the default org.openapitools.codegen.OpenAPINormalizer. It allows customization of the default normalizer. 
+
+Example:
+```
+java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -g java -i modules/openapi-generator/src/test/resources/3_0/required-properties.yaml -o /tmp/java-okhttp/ --openapi-normalizer NORMALIZER_CLASS=org.openapitools.codegen.OpenAPINormalizerTest$RemoveRequiredNormalizer
+```
+
 - `FILTER`
 
 The `FILTER` parameter allows selective inclusion of API operations based on specific criteria. It applies the `x-internal: true` property to operations that do **not** match the specified values, preventing them from being generated.
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
index 1d913e1c737..b2e5424c8da 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java
@@ -261,7 +261,7 @@ public class DefaultGenerator implements Generator {
                 if (version.atLeast("3.1.0")) {
                     config.openapiNormalizer().put("NORMALIZE_31SPEC", "true");
                 }
-                OpenAPINormalizer openapiNormalizer = new OpenAPINormalizer(openAPI, config.openapiNormalizer());
+                OpenAPINormalizer openapiNormalizer = OpenAPINormalizer.createNormalizer(openAPI, config.openapiNormalizer());
                 openapiNormalizer.normalize();
             }
         } catch (Exception e) {
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java
index f75cb1fbef3..2b16a88d580 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java
@@ -32,6 +32,8 @@ import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -39,13 +41,13 @@ import java.util.stream.Collectors;
 import static org.openapitools.codegen.utils.StringUtils.getUniqueString;
 
 public class OpenAPINormalizer {
-    private OpenAPI openAPI;
+    protected OpenAPI openAPI;
     private Map<String, String> inputRules = new HashMap<>();
     private Map<String, Boolean> rules = new HashMap<>();
 
     private TreeSet<String> anyTypeTreeSet = new TreeSet<>();
 
-    final Logger LOGGER = LoggerFactory.getLogger(OpenAPINormalizer.class);
+    protected final Logger LOGGER = LoggerFactory.getLogger(OpenAPINormalizer.class);
 
     Set<String> ruleNames = new TreeSet<>();
     Set<String> rulesDefaultToTrue = new TreeSet<>();
@@ -59,6 +61,9 @@ public class OpenAPINormalizer {
     final String DISABLE_ALL = "DISABLE_ALL";
     boolean disableAll;
 
+    // when defined, use the class name to instantiate the normalizer
+    static final String NORMALIZER_CLASS = "NORMALIZER_CLASS";
+
     // when set to true, $ref in allOf is treated as parent so that x-parent: true will be added
     // to the schema in $ref (if x-parent is not present)
     final String REF_AS_PARENT_IN_ALLOF = "REF_AS_PARENT_IN_ALLOF";
@@ -146,6 +151,25 @@ public class OpenAPINormalizer {
 
     // ============= end of rules =============
 
+    /**
+     * Factory constructor for OpenAPINormalizer.
+     *
+     * Default can be overriden by setting the NORMALIZER_CLASS rule
+     */
+    public static OpenAPINormalizer createNormalizer(OpenAPI openAPI, Map<String, String> inputRules) {
+        if (inputRules.containsKey(NORMALIZER_CLASS)) {
+            try {
+                Class clazz = Class.forName(inputRules.get(NORMALIZER_CLASS));
+                Constructor constructor = clazz.getConstructor(OpenAPI.class, Map.class);
+                return (OpenAPINormalizer) constructor.newInstance(openAPI, inputRules);
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+        } else {
+            return new OpenAPINormalizer(openAPI, inputRules);
+        }
+    }
+
     /**
      * Initializes OpenAPI Normalizer with a set of rules
      *
@@ -162,6 +186,7 @@ public class OpenAPINormalizer {
         }
 
         // a set of ruleNames
+        ruleNames.add(NORMALIZER_CLASS);
         ruleNames.add(REF_AS_PARENT_IN_ALLOF);
         ruleNames.add(REMOVE_ANYOF_ONEOF_AND_KEEP_PROPERTIES_ONLY);
         ruleNames.add(SIMPLIFY_ANYOF_STRING_AND_ENUM_STRING);
@@ -318,7 +343,7 @@ public class OpenAPINormalizer {
      * Normalizes the OpenAPI input, which may not perfectly conform to
      * the specification.
      */
-    void normalize() {
+    protected void normalize() {
         if (rules == null || rules.isEmpty() || disableAll) {
             return;
         }
@@ -341,7 +366,7 @@ public class OpenAPINormalizer {
     /**
      * Pre-populate info if it's not defined.
      */
-    private void normalizeInfo() {
+    protected void normalizeInfo() {
         if (this.openAPI.getInfo() == null) {
             Info info = new Info();
             info.setTitle("OpenAPI");
@@ -354,7 +379,7 @@ public class OpenAPINormalizer {
     /**
      * Normalizes inline models in Paths
      */
-    private void normalizePaths() {
+    protected void normalizePaths() {
         Paths paths = openAPI.getPaths();
         if (paths == null) {
             return;
@@ -429,7 +454,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void normalizeOperation(Operation operation) {
+    protected void normalizeOperation(Operation operation) {
         processRemoveXInternalFromOperation(operation);
 
         processKeepOnlyFirstTagInOperation(operation);
@@ -448,7 +473,7 @@ public class OpenAPINormalizer {
      *
      * @param content target content
      */
-    private void normalizeContent(Content content) {
+    protected void normalizeContent(Content content) {
         if (content == null || content.isEmpty()) {
             return;
         }
@@ -472,7 +497,7 @@ public class OpenAPINormalizer {
      *
      * @param operation target operation
      */
-    private void normalizeRequestBody(Operation operation) {
+    protected void normalizeRequestBody(Operation operation) {
         RequestBody requestBody = operation.getRequestBody();
         if (requestBody == null) {
             return;
@@ -496,7 +521,7 @@ public class OpenAPINormalizer {
      *
      * @param parameters List parameters
      */
-    private void normalizeParameters(List<Parameter> parameters) {
+    protected void normalizeParameters(List<Parameter> parameters) {
         if (parameters == null) {
             return;
         }
@@ -519,7 +544,7 @@ public class OpenAPINormalizer {
      *
      * @param operation target operation
      */
-    private void normalizeResponses(Operation operation) {
+    protected void normalizeResponses(Operation operation) {
         ApiResponses responses = operation.getResponses();
         if (responses == null) {
             return;
@@ -535,7 +560,7 @@ public class OpenAPINormalizer {
      *
      * @param apiResponse API response
      */
-    private void normalizeResponse(ApiResponse apiResponse) {
+    protected void normalizeResponse(ApiResponse apiResponse) {
         if (apiResponse != null) {
             normalizeContent(ModelUtils.getReferencedApiResponse(openAPI, apiResponse).getContent());
             normalizeHeaders(ModelUtils.getReferencedApiResponse(openAPI, apiResponse).getHeaders());
@@ -547,7 +572,7 @@ public class OpenAPINormalizer {
      *
      * @param headers a map of headers
      */
-    private void normalizeHeaders(Map<String, Header> headers) {
+    protected void normalizeHeaders(Map<String, Header> headers) {
         if (headers == null || headers.isEmpty()) {
             return;
         }
@@ -562,7 +587,7 @@ public class OpenAPINormalizer {
     /**
      * Normalizes securitySchemes in components
      */
-    private void normalizeComponentsSecuritySchemes() {
+    protected void normalizeComponentsSecuritySchemes() {
          if (StringUtils.isEmpty(bearerAuthSecuritySchemeName)) {
              return;
          }
@@ -592,7 +617,7 @@ public class OpenAPINormalizer {
     /**
      * Normalizes schemas in components
      */
-    private void normalizeComponentsSchemas() {
+    protected void normalizeComponentsSchemas() {
         Map<String, Schema> schemas = openAPI.getComponents().getSchemas();
         if (schemas == null) {
             return;
@@ -623,7 +648,7 @@ public class OpenAPINormalizer {
     /**
      * Normalizes schemas in component's responses.
      */
-    private void normalizeComponentsResponses() {
+    protected void normalizeComponentsResponses() {
         Map<String, ApiResponse> apiResponses = openAPI.getComponents().getResponses();
         if (apiResponses == null) {
             return;
@@ -675,7 +700,7 @@ public class OpenAPINormalizer {
 
     }
 
-    private boolean isSelfReference(String name, Schema subSchema) {
+    protected boolean isSelfReference(String name, Schema subSchema) {
         if (subSchema != null && name.equals(ModelUtils.getSimpleRef(subSchema.get$ref()))) {
             return true;
         } else {
@@ -691,20 +716,10 @@ public class OpenAPINormalizer {
      * @return Schema
      */
     public Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas) {
-        if (schema == null) {
+        if (skipNormalization(schema, visitedSchemas)) {
             return schema;
         }
-
-        if (StringUtils.isNotEmpty(schema.get$ref())) {
-            // no need to process $ref
-            return schema;
-        }
-
-        if (visitedSchemas.contains(schema)) {
-            return schema; // skip due to circular reference
-        } else {
-            visitedSchemas.add(schema);
-        }
+        markSchemaAsVisited(schema, visitedSchemas);
 
         if (ModelUtils.isArraySchema(schema)) { // array
             Schema result = normalizeArraySchema(schema);
@@ -758,35 +773,73 @@ public class OpenAPINormalizer {
         } else {
             throw new RuntimeException("Unknown schema type found in normalizer: " + schema);
         }
-
         return schema;
     }
 
-    private Schema normalizeArraySchema(Schema schema) {
+
+    /**
+     * Check if normalization is needed.
+     *
+     * No normalization needed if the schema is null or is a $ref or already processed.
+     *
+     * @param schema         Schema
+     * @param visitedSchemas a set of visited schemas
+     * @return false if normalization is needed
+     */
+    protected boolean skipNormalization(Schema schema, Set<Schema> visitedSchemas) {
+        if (schema == null) {
+            return true;
+        }
+
+        if (StringUtils.isNotEmpty(schema.get$ref())) {
+            // no need to process $ref
+            return true;
+        }
+
+        if (visitedSchemas.contains(schema)) {
+            return true; // skip due to circular reference
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Add the schema to the collection of visited schemas.
+     *
+     * @param schema schema to add
+     * @param visitedSchemas current visited schemas
+     */
+    protected void markSchemaAsVisited(Schema schema, Set<Schema> visitedSchemas) {
+        if (schema != null) {
+            visitedSchemas.add(schema);
+        }
+    }
+
+    protected Schema normalizeArraySchema(Schema schema) {
         Schema result = processNormalize31Spec(schema, new HashSet<>());
         return processSetArraytoNullable(result);
     }
 
-    private Schema normalizeMapSchema(Schema schema) {
+    protected Schema normalizeMapSchema(Schema schema) {
         return processSetMapToNullable(schema);
     }
 
-    private Schema normalizeSimpleSchema(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeSimpleSchema(Schema schema, Set<Schema> visitedSchemas) {
         Schema result = processNormalize31Spec(schema, visitedSchemas);
         return processSetPrimitiveTypesToNullable(result);
     }
 
-    private void normalizeBooleanSchema(Schema schema, Set<Schema> visitedSchemas) {
+    protected void normalizeBooleanSchema(Schema schema, Set<Schema> visitedSchemas) {
         processSimplifyBooleanEnum(schema);
         processSetPrimitiveTypesToNullable(schema);
     }
 
-    private void normalizeIntegerSchema(Schema schema, Set<Schema> visitedSchemas) {
+    protected void normalizeIntegerSchema(Schema schema, Set<Schema> visitedSchemas) {
         processAddUnsignedToIntegerWithInvalidMaxValue(schema);
         processSetPrimitiveTypesToNullable(schema);
     }
 
-    private void normalizeProperties(Map<String, Schema> properties, Set<Schema> visitedSchemas) {
+    protected void normalizeProperties(Map<String, Schema> properties, Set<Schema> visitedSchemas) {
         if (properties == null) {
             return;
         }
@@ -802,7 +855,7 @@ public class OpenAPINormalizer {
      *
      * @param schema Schema
      */
-    private void removeUnsupportedSchemasFromAllOf(Schema schema) {
+    protected void removeUnsupportedSchemasFromAllOf(Schema schema) {
         if (schema.getAllOf() == null) {
             return;
         }
@@ -825,7 +878,7 @@ public class OpenAPINormalizer {
         }
     }
 
-    private Schema normalizeAllOf(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeAllOf(Schema schema, Set<Schema> visitedSchemas) {
         removeUnsupportedSchemasFromAllOf(schema);
 
         if (schema.getAllOf() == null) {
@@ -846,7 +899,7 @@ public class OpenAPINormalizer {
         return schema;
     }
 
-    private Schema normalizeAllOfWithProperties(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeAllOfWithProperties(Schema schema, Set<Schema> visitedSchemas) {
         removeUnsupportedSchemasFromAllOf(schema);
 
         if (schema.getAllOf() == null) {
@@ -867,7 +920,7 @@ public class OpenAPINormalizer {
         return schema;
     }
 
-    private Schema normalizeOneOf(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeOneOf(Schema schema, Set<Schema> visitedSchemas) {
         // simplify first as the schema may no longer be a oneOf after processing the rule below
         schema = processSimplifyOneOf(schema);
 
@@ -895,7 +948,7 @@ public class OpenAPINormalizer {
         return schema;
     }
 
-    private Schema normalizeAnyOf(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeAnyOf(Schema schema, Set<Schema> visitedSchemas) {
         for (int i = 0; i < schema.getAnyOf().size(); i++) {
             // normalize anyOf sub schemas one by one
             Object item = schema.getAnyOf().get(i);
@@ -919,7 +972,7 @@ public class OpenAPINormalizer {
         return normalizeSchema(processSimplifyAnyOfStringAndEnumString(schema), visitedSchemas);
     }
 
-    private Schema normalizeComplexComposedSchema(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema normalizeComplexComposedSchema(Schema schema, Set<Schema> visitedSchemas) {
         // loop through properties, if any
         if (schema.getProperties() != null && !schema.getProperties().isEmpty()) {
             normalizeProperties(schema.getProperties(), visitedSchemas);
@@ -938,7 +991,7 @@ public class OpenAPINormalizer {
      *
      * @param schema Schema
      */
-    private void processUseAllOfRefAsParent(Schema schema) {
+    protected void processUseAllOfRefAsParent(Schema schema) {
         if (!getRule(REF_AS_PARENT_IN_ALLOF)) {
             return;
         }
@@ -984,7 +1037,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void processRemoveXInternalFromOperation(Operation operation) {
+    protected void processRemoveXInternalFromOperation(Operation operation) {
         if (!getRule(REMOVE_X_INTERNAL)) {
             return;
         }
@@ -1004,7 +1057,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void processKeepOnlyFirstTagInOperation(Operation operation) {
+    protected void processKeepOnlyFirstTagInOperation(Operation operation) {
         if (!getRule(KEEP_ONLY_FIRST_TAG_IN_OPERATION)) {
             return;
         }
@@ -1022,7 +1075,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void processSetTagsForAllOperations(Operation operation) {
+    protected void processSetTagsForAllOperations(Operation operation) {
         if (StringUtils.isEmpty(setTagsForAllOperations)) {
             return;
         }
@@ -1036,7 +1089,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void processSetTagsToOperationId(Operation operation) {
+    protected void processSetTagsToOperationId(Operation operation) {
         if (!getRule(SET_TAGS_TO_OPERATIONID)) {
             return;
         }
@@ -1054,7 +1107,7 @@ public class OpenAPINormalizer {
      *
      * @param operation Operation
      */
-    private void processSetTagsToVendorExtension(Operation operation) {
+    protected void processSetTagsToVendorExtension(Operation operation) {
         if (StringUtils.isEmpty(setTagsToVendorExtension)) {
             return;
         }
@@ -1077,7 +1130,7 @@ public class OpenAPINormalizer {
         }
     }
 
-    private void processFixDuplicatedOperationId(Operation operation) {
+    protected void processFixDuplicatedOperationId(Operation operation) {
         if (!getRule(FIX_DUPLICATED_OPERATIONID)) {
             return;
         }
@@ -1101,7 +1154,7 @@ public class OpenAPINormalizer {
      *
      * @param schema Schema
      */
-    private void processRemoveAnyOfOneOfAndKeepPropertiesOnly(Schema schema) {
+    protected void processRemoveAnyOfOneOfAndKeepPropertiesOnly(Schema schema) {
         if (!getRule(REMOVE_ANYOF_ONEOF_AND_KEEP_PROPERTIES_ONLY)) {
             return;
         }
@@ -1123,7 +1176,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSimplifyAnyOfStringAndEnumString(Schema schema) {
+    protected Schema processSimplifyAnyOfStringAndEnumString(Schema schema) {
         if (!getRule(SIMPLIFY_ANYOF_STRING_AND_ENUM_STRING)) {
             return schema;
         }
@@ -1179,7 +1232,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSimplifyOneOf(Schema schema) {
+    protected Schema processSimplifyOneOf(Schema schema) {
         if (!getRule(SIMPLIFY_ONEOF_ANYOF)) {
             return schema;
         }
@@ -1240,7 +1293,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSetArraytoNullable(Schema schema) {
+    protected Schema processSetArraytoNullable(Schema schema) {
         if (!getRule(SET_CONTAINER_TO_NULLABLE)) {
             return schema;
         }
@@ -1264,7 +1317,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSetPrimitiveTypesToNullable(Schema schema) {
+    protected Schema processSetPrimitiveTypesToNullable(Schema schema) {
         if (!getRule(SET_PRIMITIVE_TYPES_TO_NULLABLE)) {
             return schema;
         }
@@ -1282,7 +1335,7 @@ public class OpenAPINormalizer {
         return schema;
     }
 
-    private Schema setNullable(Schema schema) {
+    protected Schema setNullable(Schema schema) {
         if (schema.getNullable() != null || (schema.getExtensions() != null && schema.getExtensions().containsKey("x-nullable"))) {
             // already set, don't overwrite
             return schema;
@@ -1297,7 +1350,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSetMapToNullable(Schema schema) {
+    protected Schema processSetMapToNullable(Schema schema) {
         if (!getRule(SET_CONTAINER_TO_NULLABLE)) {
             return schema;
         }
@@ -1316,7 +1369,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processSimplifyAnyOf(Schema schema) {
+    protected Schema processSimplifyAnyOf(Schema schema) {
         if (!getRule(SIMPLIFY_ONEOF_ANYOF)) {
             return schema;
         }
@@ -1373,7 +1426,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private void processSimplifyBooleanEnum(Schema schema) {
+    protected void processSimplifyBooleanEnum(Schema schema) {
         if (!getRule(SIMPLIFY_BOOLEAN_ENUM)) {
             return;
         }
@@ -1393,7 +1446,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private void processAddUnsignedToIntegerWithInvalidMaxValue(Schema schema) {
+    protected void processAddUnsignedToIntegerWithInvalidMaxValue(Schema schema) {
         if (!getRule(ADD_UNSIGNED_TO_INTEGER_WITH_INVALID_MAX_VALUE)) {
             return;
         }
@@ -1420,7 +1473,7 @@ public class OpenAPINormalizer {
      * @param schema Schema
      * @return Schema
      */
-    private Schema processRefactorAllOfWithPropertiesOnly(Schema schema) {
+    protected Schema processRefactorAllOfWithPropertiesOnly(Schema schema) {
         if (!getRule(REFACTOR_ALLOF_WITH_PROPERTIES_ONLY)) {
             return schema;
         }
@@ -1460,7 +1513,7 @@ public class OpenAPINormalizer {
      * @param visitedSchemas a set of visited schemas
      * @return Schema
      */
-    private Schema processNormalize31Spec(Schema schema, Set<Schema> visitedSchemas) {
+    protected Schema processNormalize31Spec(Schema schema, Set<Schema> visitedSchemas) {
         if (!getRule(NORMALIZE_31SPEC)) {
             return schema;
         }
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/OpenAPINormalizerTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/OpenAPINormalizerTest.java
index 85104bc2ea0..3c533fbf731 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/OpenAPINormalizerTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/OpenAPINormalizerTest.java
@@ -24,10 +24,7 @@ import io.swagger.v3.oas.models.security.SecurityScheme;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.testng.annotations.Test;
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 
 import static org.testng.Assert.*;
 
@@ -965,4 +962,32 @@ public class OpenAPINormalizerTest {
         assertEquals(scheme.getName(), null);
         assertEquals(scheme.getIn(), null);
     }
+
+    @Test
+    public void testNormalizerClass() {
+        OpenAPI openAPI = TestUtils.parseSpec("src/test/resources/3_0/required-properties.yaml");
+        Map<String, String> inputRules = Map.of(
+                "NORMALIZER_CLASS", RemoveRequiredNormalizer.class.getName()
+        );
+        OpenAPINormalizer openAPINormalizer = OpenAPINormalizer.createNormalizer(openAPI, inputRules);
+        openAPINormalizer.normalize();
+        Schema requiredProperties = openAPI.getComponents().getSchemas().get("RequiredProperties");
+        assertEquals(requiredProperties.getRequired(), null);
+    }
+
+    public static class RemoveRequiredNormalizer extends OpenAPINormalizer {
+
+        public RemoveRequiredNormalizer(OpenAPI openAPI, Map<String, String> inputRules) {
+            super(openAPI, inputRules);
+        }
+
+        @Override
+        public Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas) {
+            if (skipNormalization(schema, visitedSchemas)) {
+                return schema;
+            }
+            schema.setRequired(null);
+            return super.normalizeSchema(schema, visitedSchemas);
+        }
+    }
 }