diff --git a/src/main/java/com/qdesrame/openapi/diff/compare/SchemaDiff.java b/src/main/java/com/qdesrame/openapi/diff/compare/SchemaDiff.java
index e50754dd7..9d8b774da 100644
--- a/src/main/java/com/qdesrame/openapi/diff/compare/SchemaDiff.java
+++ b/src/main/java/com/qdesrame/openapi/diff/compare/SchemaDiff.java
@@ -84,7 +84,7 @@ protected static Schema resolveComposedSchema(Components components, Schema sche
     return schema;
   }
 
-  protected static Schema addSchema(Schema schema, Schema fromSchema) {
+  protected static Schema addSchema(Schema<?> schema, Schema<?> fromSchema) {
     if (fromSchema.getProperties() != null) {
       if (schema.getProperties() == null) {
         schema.setProperties(fromSchema.getProperties());
diff --git a/src/main/java/com/qdesrame/openapi/diff/output/MarkdownRender.java b/src/main/java/com/qdesrame/openapi/diff/output/MarkdownRender.java
index 73a519f8c..9e1729e70 100644
--- a/src/main/java/com/qdesrame/openapi/diff/output/MarkdownRender.java
+++ b/src/main/java/com/qdesrame/openapi/diff/output/MarkdownRender.java
@@ -175,8 +175,8 @@ protected String itemResponse(String title, String code, String description) {
   protected String headers(ChangedHeaders headers) {
     StringBuilder sb = new StringBuilder();
     if (headers != null) {
-      sb.append(listHeader("New header", headers.getIncreased()));
-      sb.append(listHeader("Deleted header", headers.getMissing()));
+      sb.append(listHeader("New header", headers.getIncreased()))
+          .append(listHeader("Deleted header", headers.getMissing()));
       headers
           .getChanged()
           .entrySet()
diff --git a/src/main/java/com/qdesrame/openapi/diff/utils/RefPointer.java b/src/main/java/com/qdesrame/openapi/diff/utils/RefPointer.java
index 4cc8e715f..a1382bfa8 100644
--- a/src/main/java/com/qdesrame/openapi/diff/utils/RefPointer.java
+++ b/src/main/java/com/qdesrame/openapi/diff/utils/RefPointer.java
@@ -28,22 +28,16 @@ private Map<String, T> getMap(Components components) {
     switch (refType) {
       case REQUEST_BODIES:
         return (Map<String, T>) components.getRequestBodies();
-
       case RESPONSES:
         return (Map<String, T>) components.getResponses();
-
       case PARAMETERS:
         return (Map<String, T>) components.getParameters();
-
       case SCHEMAS:
         return (Map<String, T>) components.getSchemas();
-
       case HEADERS:
-        return (Map<String, T>) components.getSchemas();
-
+        return (Map<String, T>) components.getHeaders();
       case SECURITY_SCHEMES:
         return (Map<String, T>) components.getSecuritySchemes();
-
       default:
         throw new IllegalArgumentException("Not mapped for refType: " + refType);
     }