diff --git a/HelloWorld.pdf b/HelloWorld.pdf
new file mode 100644
index 0000000..85e6bcb
Binary files /dev/null and b/HelloWorld.pdf differ
diff --git a/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java b/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java
index 9680451..e84cd24 100644
--- a/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java
+++ b/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java
@@ -52,6 +52,11 @@ public final class Document implements Bytes {
      */
     private static final String EOF = "%%%%EOF";
 
+    /**
+     * Count.
+     */
+    private final Count count;
+
     /**
      * PDF metadata.
      */
@@ -65,10 +70,16 @@ public final class Document implements Bytes {
     /**
      * Ctor.
      *
+     * @param count Count
      * @param metadata Metadata
      * @param catalog Catalog
      */
-    public Document(final Metadata metadata, final Catalog catalog) {
+    public Document(
+        final Count count,
+        final Metadata metadata,
+        final Catalog catalog
+    ) {
+        this.count = count;
         this.metadata = metadata;
         this.catalog = catalog;
     }
@@ -87,8 +98,9 @@ public byte[] asBytes() throws Exception {
         baos.write(this.catalog.asBytes());
         baos.write(
             new FormattedText(
-                "trailer << /Root %s /Size 6 >>\n",
-                this.catalog.reference()
+                "trailer << /Root %s /Size %d >>\n",
+                this.catalog.reference(),
+                this.count.value()
             ).asString().getBytes()
         );
         baos.write(Document.EOF.getBytes());
diff --git a/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java b/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java
index 7a79dff..814e0bd 100644
--- a/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java
+++ b/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java
@@ -45,6 +45,7 @@ void buildDocument() {
             "Must represent a PDF document",
             new TextOf(
                 new Document(
+                    count,
                     new Metadata(count, "Hello World"),
                     new Catalog(
                         count,
@@ -84,7 +85,7 @@ void buildDocument() {
                     "4 0 obj\n<< /Type /Page /Resources 2 0 R /Contents 3 0 R /Parent 5 0 R >>\nendobj",
                     "2 0 obj\n<< /Font << /F1 << /Type /Font /BaseFont /Times-Roman /Subtype /Type1 >> >> >>\nendobj",
                     "3 0 obj\n<< /Length 62 >>\nstream\nBT /F1 18 Tf 0 0 Td (Hello World with \\(, \\), \\\\ and \\r) Tj ET\nendstream\nendobj",
-                    "trailer << /Root 6 0 R /Size 6 >>",
+                    "trailer << /Root 6 0 R /Size 7 >>",
                     "%%%%EOF"
                 )
             )
@@ -99,6 +100,7 @@ void buildFile() throws Exception {
         Files.write(
             file.toPath(),
             new Document(
+                count,
                 new Metadata(count, "Hello World"),
                 new Catalog(
                     count,