diff --git a/ghc-snap-server.spec b/ghc-snap-server.spec
index 2051976..7d7ba9c 100644
--- a/ghc-snap-server.spec
+++ b/ghc-snap-server.spec
@@ -59,6 +59,7 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkg_name}-%{version}
+cabal-tweak-dep-ver attoparsec '< 0.13' '< 0.14'
 
 
 %build