diff --git a/reveal.cabal b/reveal.cabal
index 3059162..9f2ef59 100644
--- a/reveal.cabal
+++ b/reveal.cabal
@@ -24,7 +24,7 @@ executable reveal
   build-depends:       base >=4.9.1 && <4.13
                      , bytestring
                      , containers
-                     , Hufflepdf
+                     , Hufflepdf >= 0.2.0
                      , zlib
   hs-source-dirs:      src
   default-language:    Haskell2010
diff --git a/src/Main.hs b/src/Main.hs
index 20fcd6a..c0f957b 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -47,7 +47,7 @@ revealContent content = content {
 
 reveal :: Document -> Document
 reveal document = document {
-    contents = revealContent <$> (contents document)
+    updates = revealContent <$> (updates document)
   }
 
 main :: IO ()