diff --git a/dev-haskell/conduit/conduit-1.3.4.2.ebuild b/dev-haskell/conduit/conduit-1.3.4.2.ebuild
index 387f2ef974040..eada6d7aee07f 100644
--- a/dev-haskell/conduit/conduit-1.3.4.2.ebuild
+++ b/dev-haskell/conduit/conduit-1.3.4.2.ebuild
@@ -24,7 +24,7 @@ RDEPEND="dev-haskell/exceptions:=[profile?]
 	dev-haskell/text:=[profile?]
 	dev-haskell/unliftio-core:=[profile?]
 	dev-haskell/vector:=[profile?]
-	>=dev-lang/ghc-8.6.3:=
+	>=dev-lang/ghc-8.6.3:= <dev-lang/ghc-9.1
 "
 DEPEND="${RDEPEND}
 	>=dev-haskell/cabal-2.4.0.1