diff --git a/reveal.cabal b/reveal.cabal
index 2753954..3059162 100644
--- a/reveal.cabal
+++ b/reveal.cabal
@@ -21,7 +21,7 @@ executable reveal
   main-is:             Main.hs
   other-modules:       PDF.TextRendering
   -- other-extensions:
-  build-depends:       base >=4.12 && <4.13
+  build-depends:       base >=4.9.1 && <4.13
                      , bytestring
                      , containers
                      , Hufflepdf