diff --git a/src/main/java/br/com/checker/emag/core/ContentEvaluation.java b/src/main/java/br/com/checker/emag/core/ContentEvaluation.java
index 3083b68..2809b0b 100644
--- a/src/main/java/br/com/checker/emag/core/ContentEvaluation.java
+++ b/src/main/java/br/com/checker/emag/core/ContentEvaluation.java
@@ -240,7 +240,7 @@ public class ContentEvaluation extends Evaluation {
 			}
 
 			// Caso seja diferente de html5
-			if (!doctype.equals("<!DOCTYPEhtml>")) {
+			if (!doctype.equalsIgnoreCase("<!DOCTYPEhtml>")) {
 
 				if (xmlLang == null) {
 					occurrences.add(this.buildOccurrence("3.1", true, tagHtml,
diff --git a/src/main/java/br/com/checker/emag/core/MarkEvaluation.java b/src/main/java/br/com/checker/emag/core/MarkEvaluation.java
index 69f0520..5d12678 100644
--- a/src/main/java/br/com/checker/emag/core/MarkEvaluation.java
+++ b/src/main/java/br/com/checker/emag/core/MarkEvaluation.java
@@ -942,7 +942,7 @@ public class MarkEvaluation extends Evaluation {
 		List<Occurrence> occurrences = new ArrayList<Occurrence>();
 		Element firstElement = this.getDocument().getFirstElement();
 
-		if (firstElement.toString().replace(" ", "").equals("<!DOCTYPEhtml>")) {
+		if (firstElement.toString().replace(" ", "").equalsIgnoreCase("<!DOCTYPEhtml>")) {
 
 			Element header = getDocument().getFirstElement("header");
 			Element nav = getDocument().getFirstElement("nav");
--
libgit2 0.21.2