diff --git a/.travis.yml b/.travis.yml
index 1322045..9c9d3bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ install:
 #  - ( $CABAL122 && cabal install cabal-install --constraint "Cabal >= 1.22" && ghc-pkg unregister Cabal ) || true
   - echo $PATH
   - which cabal
-#  - cabal install Cabal --constraint "Cabal == $(cabal --version | grep 'Cabal library' | awk '{ print $3 }' | tail -n1)"
+  - if [ -n "$(cabal --version | grep 'Cabal library' | awk '{ print $3 }' | tail -n1 | sed -n '/^1.18/p')" ]; then cabal install cabal-install --constraint "Cabal == 1.18.* && > 1.18.0"; fi
   - cabal install happy
   - happy --version
   - cabal install -j --only-dependencies --enable-tests --constraint "tagged < 0.8"
@@ -26,7 +26,6 @@ script:
   - if [ -n "$(ghc --version | awk '{ print $8 }' | sed -n '/^7.8/p')" ]; then export WERROR="--ghc-option=-Werror"; fi
   - cabal configure --enable-tests $WERROR
   - cabal build
-  - export cabal_helper_libexecdir=$HOME/.cabal/bin
   - export ghc_mod_datadir=$PWD
   - cabal test
 
diff --git a/ghc-mod.cabal b/ghc-mod.cabal
index 3743948..5879f66 100644
--- a/ghc-mod.cabal
+++ b/ghc-mod.cabal
@@ -121,7 +121,7 @@ Library
                       , bytestring
                       , cereal >= 0.4
                       , containers
-                      , cabal-helper >= 0.3.2.0
+                      , cabal-helper >= 0.3.3.0
                       , deepseq
                       , directory
                       , filepath