diff --git a/Network/HTTP2/RandomSkewHeap.hs b/Network/HTTP2/RandomSkewHeap.hs
--- a/Network/HTTP2/RandomSkewHeap.hs
+++ b/Network/HTTP2/RandomSkewHeap.hs
@@ -68,4 +68,4 @@
 
 gen :: GenIO
 gen = unsafePerformIO createSystemRandom
-
+{-# NOINLINE gen #-}
diff --git a/http2.cabal b/http2.cabal
--- a/http2.cabal
+++ b/http2.cabal
@@ -1,5 +1,5 @@
 Name:                   http2
-Version:                1.0.1
+Version:                1.0.2
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3