diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 3.3.2
+
+* Fixing a bug of HTTP/2 without fd cache.
+
 ## 3.3.1
 
 * Using gracefullClose of network 3.1.1 or later if available.
diff --git a/Network/Wai/Handler/Warp/HTTP2/File.hs b/Network/Wai/Handler/Warp/HTTP2/File.hs
--- a/Network/Wai/Handler/Warp/HTTP2/File.hs
+++ b/Network/Wai/Handler/Warp/HTTP2/File.hs
@@ -15,8 +15,12 @@
 
 pReadMaker :: InternalInfo -> PositionReadMaker
 pReadMaker ii path = do
-    (Just fd, refresh) <- getFd ii path
-    return (pread fd, Refresher refresh)
+    (mfd, refresh) <- getFd ii path
+    case mfd of
+      Just fd -> return (pread fd, Refresher refresh)
+      Nothing -> do
+          fd <- openFile path
+          return (pread fd, Closer $ closeFile fd)
   where
     pread :: Fd -> PositionRead
     pread fd off bytes buf = fromIntegral <$> positionRead fd buf bytes' off'
diff --git a/warp.cabal b/warp.cabal
--- a/warp.cabal
+++ b/warp.cabal
@@ -1,5 +1,5 @@
 Name:                warp
-Version:             3.3.1
+Version:             3.3.2
 Synopsis:            A fast, light-weight web server for WAI applications.
 License:             MIT
 License-file:        LICENSE