diff --git a/pitfall/pitfall/minimal-annotation.rkt b/pitfall/pitfall/minimal-annotation.rkt
index a815a736..17ccd103 100644
--- a/pitfall/pitfall/minimal-annotation.rkt
+++ b/pitfall/pitfall/minimal-annotation.rkt
@@ -10,7 +10,9 @@
 (co-io 3 0 (co-page #:parent (co-io-ref 2 0)
                     #:mediabox '(0 0 612 792)
                     #:resources (co-io-ref 4 0)
-                    #:contents (co-io-ref 5 0)))
+                    #:contents (co-io-ref 5 0)
+                    ))
+#;#:annots (co-io-ref 7 0)
 
 ;; resources
 (co-io 4 0
@@ -18,11 +20,6 @@
         'ProcSet (co-array '(PDF Text))
         'Font (make-co-dict 'F1 (co-io-ref 6 0))))
 
-;; font
-(co-io 6 0
-       (make-co-dict
-        'Type 'Font 'Subtype 'Type1 'Name 'F1 'BaseFont 'Helvetica))
-
 ;; contents
 (co-io 5 0
        (make-co-stream
@@ -32,3 +29,36 @@
 (Hello World)Tj
 ET"))
 
+
+;; font
+(co-io 6 0
+       (make-co-dict
+        'Type 'Font 'Subtype 'Type1 'Name 'F1 'BaseFont 'Helvetica))
+
+;; annots
+#|
+(co-io 7 0
+       (co-array (list (co-io-ref 8 0)))
+
+(co-io 8 0
+       (co-dict
+        (hasheq
+         'Rect
+         (co-array '(260 596.0184 404.048 613.331))
+         'Subtype
+         'StrikeOut
+         'Contents
+         ""
+         'F
+         4
+         'M
+         "D:20170405003853Z00'00'"
+         'Type
+         'Annot
+         'C
+         (co-array '(0.8945577 0.05464891 0.07036456))
+         'AP
+         (co-io-ref 11 0)
+         'QuadPoints
+         (co-array '(260 613.331 404.048 613.331 260 596.0184 404.048 596.0184)))))
+|#
\ No newline at end of file
diff --git a/pitfall/pitfall/render.rkt b/pitfall/pitfall/render.rkt
index 0c248116..987c1b44 100644
--- a/pitfall/pitfall/render.rkt
+++ b/pitfall/pitfall/render.rkt
@@ -34,7 +34,7 @@
        (if (co-io? cosexpr)
            (cons (cons (co-io-idx cosexpr) offset) io-locs)
            io-locs))))
-  (define header-str (cosexpr->bytes (co-header "%PDF-1.1\n%¥±ë")))
+  (define header-str (cosexpr->bytes (co-header "%PDF-1.3\n%¥±ë")))
   (define trailer-str (cosexpr->bytes
                        (co-trailer (co-dict (hasheq 'Size (length bstrs) 'Root (co-io-ref 1 0))))))
   (define last-offset (for/sum ([bstr (in-list bstrs)])
@@ -107,12 +107,14 @@
 (define (co-page #:parent parent
                  #:mediabox pts
                  #:resources [rsrcs (co-dict (hasheq))]
-                 #:contents contents)
+                 #:contents contents
+                 #:annots [annots (co-array null)])
   (co-dict (hasheq 'Type 'Page
                    'Parent parent
                    'MediaBox (co-array pts)
                    'Resources rsrcs
-                   'Contents contents)))
+                   'Contents contents
+                   'Annots annots)))
 
 (define (make-co-dict . xs)
   (co-dict (apply hasheq xs)))