diff --git a/index.html b/index.html
index 824dfe23a..d38227c1a 100644
--- a/index.html
+++ b/index.html
@@ -89,7 +89,7 @@ function sitesearch() {
   </ul>
   <h4>Develop Applications</h4>
   <ul>
-    <li><a href="http://hackage.haskell.org/package/gf-3.7.1/docs/PGF.html">PGF library API (Haskell)</a>
+    <li><a href="http://hackage.haskell.org/package/gf-3.9/docs/PGF.html">PGF library API (Haskell)</a>
     <li><a href="doc/python-api.html">PGF library API (Python)</a>
     <li><a href="doc/java-api/index.html">PGF library API (Java)</a>
     <li><a href="doc/dotNet-api/index.html">PGF library API (.NET)</a>