diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 1.5.0.5
+
+* Avoid lazy I/O in mkEmbeddedStatic (fixes [#149](https://github.com/yesodweb/yesod/issues/149))
+
 ## 1.5.0.4
 
 * Doc tweaks
diff --git a/Yesod/EmbeddedStatic/Generators.hs b/Yesod/EmbeddedStatic/Generators.hs
--- a/Yesod/EmbeddedStatic/Generators.hs
+++ b/Yesod/EmbeddedStatic/Generators.hs
@@ -43,6 +43,7 @@
 import System.Directory (doesDirectoryExist, getDirectoryContents, findExecutable)
 import System.FilePath ((</>))
 import Text.Jasmine (minifym)
+import qualified Data.ByteString as BS
 import qualified Data.ByteString.Lazy as BL
 import qualified Data.Conduit.List as C
 import Data.Conduit.Binary (sourceHandle)
@@ -71,8 +72,9 @@
                     ebHaskellName = Just $ pathToName loc
                   , ebLocation = loc
                   , ebMimeType = mime
-                  , ebProductionContent = BL.readFile f
-                  , ebDevelReload = [| BL.readFile $(litE $ stringL f) |]
+                  , ebProductionContent = fmap BL.fromStrict (BS.readFile f)
+                  , ebDevelReload = [| fmap BL.fromStrict
+                                       (BS.readFile $(litE $ stringL f)) |]
                   }
     return [entry]
 
diff --git a/yesod-static.cabal b/yesod-static.cabal
--- a/yesod-static.cabal
+++ b/yesod-static.cabal
@@ -1,5 +1,5 @@
 name:            yesod-static
-version:         1.5.0.4
+version:         1.5.0.5
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>