diff --git a/src/Yesod/Form/Bootstrap4.hs b/src/Yesod/Form/Bootstrap4.hs
--- a/src/Yesod/Form/Bootstrap4.hs
+++ b/src/Yesod/Form/Bootstrap4.hs
@@ -11,6 +11,7 @@
   , BootstrapFormLayout(..)
   , BootstrapGridOptions(..)
   , bfs
+  , bfsFile
   , withPlaceholder
   , withAutofocus
   , withLargeInput
@@ -29,7 +30,12 @@
 import           Yesod.Form
 
 bfs :: RenderMessage site msg => msg -> FieldSettings site
-bfs msg = FieldSettings (SomeMessage msg) Nothing Nothing Nothing [("class", "form-control")]
+bfs msg
+  = FieldSettings (SomeMessage msg) Nothing Nothing Nothing [("class", "form-control")]
+
+bfsFile :: RenderMessage site msg => msg -> FieldSettings site
+bfsFile msg
+  = FieldSettings (SomeMessage msg) Nothing Nothing Nothing [("class", "form-control-file")]
 
 withPlaceholder :: Text -> FieldSettings site -> FieldSettings site
 withPlaceholder placeholder fs = fs { fsAttrs = newAttrs }
diff --git a/yesod-form-bootstrap4.cabal b/yesod-form-bootstrap4.cabal
--- a/yesod-form-bootstrap4.cabal
+++ b/yesod-form-bootstrap4.cabal
@@ -1,11 +1,13 @@
--- This file has been generated from package.yaml by hpack version 0.28.2.
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.31.0.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 394ee8edcbb802cb7628af29db1bb090b6fc8682b129dd772eaa73a32e5e4ee5
+-- hash: 4bbff4c394ce1a526891998f9600319c5f8354612e0160aeace56e55c1c0263e
 
 name:           yesod-form-bootstrap4
-version:        2.0.0
+version:        2.1.0
 synopsis:       renderBootstrap4
 category:       Web
 homepage:       https://github.com/ncaq/yesod-form-bootstrap4#readme
@@ -15,7 +17,6 @@
 copyright:      © ncaq
 license:        MIT
 build-type:     Simple
-cabal-version:  >= 1.10
 
 source-repository head
   type: git