diff --git a/src/Result/Item/Participant.php b/src/Result/Item/Participant.php
index 44e6e80..29beae7 100644
--- a/src/Result/Item/Participant.php
+++ b/src/Result/Item/Participant.php
@@ -183,15 +183,15 @@ class Participant extends BaseItem
                 break;
 
             case 'blacklisted':
-                $this->blacklisted = 'Y' === trim($value);
+                $this->blacklisted = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'sent':
-                $this->sent = 'Y' === trim($value);
+                $this->sent = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'remindersent':
-                $this->reminderSent = 'Y' === trim($value);
+                $this->reminderSent = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'remindercount':
@@ -199,7 +199,7 @@ class Participant extends BaseItem
                 break;
 
             case 'completed':
-                $this->completed = 'Y' === trim($value);
+                $this->completed = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'usesleft':
diff --git a/src/Result/Item/QuestionShort.php b/src/Result/Item/QuestionShort.php
index 1228964..107ded3 100644
--- a/src/Result/Item/QuestionShort.php
+++ b/src/Result/Item/QuestionShort.php
@@ -193,11 +193,11 @@ class QuestionShort extends BaseItem
                 break;
 
             case 'other':
-                $this->other = 'Y' === trim($value);
+                $this->other = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'mandatory':
-                $this->mandatory = 'Y' === trim($value);
+                $this->mandatory = 'Y' === trim(strtoupper($value));
                 break;
 
             case 'question_order':
diff --git a/src/Result/Item/Survey.php b/src/Result/Item/Survey.php
index 1dc64e7..0f83073 100644
--- a/src/Result/Item/Survey.php
+++ b/src/Result/Item/Survey.php
@@ -86,7 +86,7 @@ class Survey extends BaseItem
                 break;
 
             case 'active':
-                $this->active = 'Y' === trim($value);
+                $this->active = 'Y' === trim(strtoupper($value));
                 break;
         }
     }