diff --git a/src/Parser/ArchiveIterator.php b/src/Parser/ArchiveIterator.php
index 0db5480..cc1a0b1 100644
--- a/src/Parser/ArchiveIterator.php
+++ b/src/Parser/ArchiveIterator.php
@@ -57,11 +57,11 @@ public function next(): void
         $position = ftell($this->handle);
 
         $headerData = fread($this->handle, 512);
-        if (strlen($headerData) < 512) {
+        if ($headerData === false || strlen($headerData) < 512) {
             throw new InvalidArchiveFormatException(
                 sprintf(
                     'Invalid TAR archive format: Unexpected end of file, returned non-block size: %d bytes',
-                    strlen($headerData)
+                    $headerData === false ? 0 : strlen($headerData)
                 )
             );
         }
@@ -91,11 +91,11 @@ public function next(): void
         if ($contentBlockSize > 0) {
             if ($this->readContent) {
                 $blockContent = fread($this->handle, $contentBlockSize);
-                if (strlen($blockContent) < $contentBlockSize) {
+                if ($blockContent === false || strlen($blockContent) < $contentBlockSize) {
                     throw new InvalidArchiveFormatException(
                         sprintf(
                             'Invalid TAR archive format: Unexpected end of file, returned non-block size: %d bytes',
-                            strlen($blockContent)
+                            $blockContent === false ? 0 : strlen($blockContent)
                         )
                     );
                 }
diff --git a/src/Parser/Header.php b/src/Parser/Header.php
index c8c152d..bb0397a 100644
--- a/src/Parser/Header.php
+++ b/src/Parser/Header.php
@@ -42,7 +42,7 @@ public function __construct(string $content)
     {
         $length = strlen($content);
         if ($length !== 512) {
-            new InvalidArgumentException(sprintf('Tar header must be 512 bytes length, %d bytes got', $length));
+            throw new InvalidArgumentException(sprintf('Tar header must be 512 bytes length, %d bytes got', $length));
         }
 
         $this->content = $content;