diff --git a/Makefile b/Makefile
index 21830d27e..095264f7f 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ pandoc=$(shell find dist -name pandoc -type f -exec ls -t {} \; | head -1)
 SOURCEFILES?=$(shell find pandoc.hs src test -name '*.hs')
 BRANCH?=master
 RESOLVER=lts-12
-GHCOPTS=-fdiagnostics-color=always -Wall -fno-warn-unused-do-bind -Wincomplete-record-updates -Wnoncanonical-monad-instances -Wnoncanonical-monadfail-instances -Wincomplete-uni-patterns -Werror=missing-home-modules -Widentities -Wcpp-undef
+GHCOPTS=-fdiagnostics-color=always -Wall -fno-warn-unused-do-bind -Wincomplete-record-updates -Wnoncanonical-monad-instances -Wnoncanonical-monadfail-instances -Wincomplete-uni-patterns -Werror=missing-home-modules -Widentities -Wcpp-undef -j +RTS -A32M -RTS
 # Later:
 # -Wpartial-fields        (currently used in Powerpoint writer)
 # -Wmissing-export-lists  (currently some Odt modules violate this)