diff --git a/src/System/Texrunner/Online.hs b/src/System/Texrunner/Online.hs
index e24f92b..c3d6ed8 100644
--- a/src/System/Texrunner/Online.hs
+++ b/src/System/Texrunner/Online.hs
@@ -43,6 +43,7 @@ module System.Texrunner.Online
   ) where
 
 import           Control.Applicative
+import           Control.Monad                (void)
 import           Control.Monad.Reader
 import qualified Data.Attoparsec.ByteString   as A
 import           Data.ByteString.Char8        (ByteString)
diff --git a/texrunner.cabal b/texrunner.cabal
index 12d223a..b0216d3 100644
--- a/texrunner.cabal
+++ b/texrunner.cabal
@@ -31,7 +31,7 @@ library
     System.Texrunner.Online
     System.Texrunner.Parse
   build-depends:
-    base       >=4.6  && <4.18,
+    base       >=4.6  && <4.19,
     bytestring >=0.10 && <1.0,
     filepath,
     directory  >=1.2  && <2.0,