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 bcdba5b..8fc8d5d 100644
--- a/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java
+++ b/src/main/java/com/github/fabriciofx/cactoos/pdf/Document.java
@@ -98,9 +98,10 @@ public byte[] asBytes() throws Exception {
         baos.write(this.catalog.asBytes());
         baos.write(
             new FormattedText(
-                "trailer << /Root %s /Size %d >>\n",
+                "trailer << /Root %s /Size %d /Info %s >>\n",
                 this.catalog.reference(),
-                this.count.value()
+                this.count.value(),
+                this.information.reference()
             ).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 d151465..fc51da1 100644
--- a/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java
+++ b/src/test/java/com/github/fabriciofx/cactoos/pdf/DocumentTest.java
@@ -96,7 +96,7 @@ 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\n(Hello World with \\(, \\), \\\\ and \\r) Tj\nET\nendstream\nendobj",
-                    "trailer << /Root 6 0 R /Size 7 >>",
+                    "trailer << /Root 6 0 R /Size 7 /Info 1 0 R >>",
                     "%%%%EOF"
                 )
             )
@@ -186,7 +186,7 @@ void buildMultiTextDocument() {
                     "ET",
                     "endstream",
                     "endobj",
-                    "trailer << /Root 6 0 R /Size 7 >>",
+                    "trailer << /Root 6 0 R /Size 7 /Info 1 0 R >>",
                     "%%%%EOF"
                 )
             )
@@ -262,7 +262,7 @@ void buildTwoPagesDocument() {
                     "7 0 obj\n<< /Type /Page /Resources 5 0 R /Contents 6 0 R /Parent 8 0 R >>\nendobj",
                     "5 0 obj\n<< /Font << /F1 << /Type /Font /BaseFont /Times-Roman /Subtype /Type1 >> >> >>\nendobj",
                     "6 0 obj\n<< /Length 33 >>\nstream\nBT /F1 18 Tf 0 0 Td\n(World) Tj\nET\nendstream\nendobj",
-                    "trailer << /Root 9 0 R /Size 10 >>",
+                    "trailer << /Root 9 0 R /Size 10 /Info 1 0 R >>",
                     "%%%%EOF"
                 )
             )