diff --git a/.travis.yml b/.travis.yml
index b89c415a..2eb8f375 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -41,6 +41,9 @@ matrix:
   - env: BUILD=cabal GHCVER=8.2.2 CABALVER=2.0 HAPPYVER=1.19.5 ALEXVER=3.1.7
     compiler: ": #GHC 8.2.2"
     addons: {apt: {packages: [cabal-install-2.0,ghc-8.2.2,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}
+  - env: BUILD=cabal GHCVER=8.4.3 CABALVER=2.0 HAPPYVER=1.19.5 ALEXVER=3.1.7
+    compiler: ": #GHC 8.4.3"
+    addons: {apt: {packages: [cabal-install-2.2,ghc-8.4.3,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}
 
   # Build with the newest GHC and cabal-install. This is an accepted failure,
   # see below.
@@ -62,7 +65,7 @@ matrix:
     compiler: ": #stack 8.0.2"
     addons: {apt: {packages: [libgmp-dev]}}
 
-  - env: BUILD=stack ARGS="--resolver lts-10"
+  - env: BUILD=stack ARGS="--resolver lts-11"
     compiler: ": #stack 8.2.2"
     addons: {apt: {packages: [libgmp-dev]}}
 
@@ -85,7 +88,7 @@ matrix:
     compiler: ": #stack 8.0.2 osx"
     os: osx
 
-  - env: BUILD=stack ARGS="--resolver lts-10"
+  - env: BUILD=stack ARGS="--resolver lts-11"
     compiler: ": #stack 8.2.2 osx"
     os: osx
 
@@ -111,9 +114,9 @@ before_install:
 - |
   if [ `uname` = "Darwin" ]
   then
-    travis_retry curl --insecure -L https://www.stackage.org/stack/osx-x86_64 | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin
+    travis_retry curl --insecure -L https://get.haskellstack.org/stable/osx-x86_64.tar.gz | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin
   else
-    travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+    travis_retry curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
   fi
 
   # Use the more reliable S3 mirror of Hackage
@@ -121,10 +124,6 @@ before_install:
   echo 'remote-repo: hackage.haskell.org:http://hackage.fpcomplete.com/' > $HOME/.cabal/config
   echo 'remote-repo-cache: $HOME/.cabal/packages' >> $HOME/.cabal/config
 
-  if [ "$CABALVER" != "1.16" ]
-  then
-    echo 'jobs: $ncpus' >> $HOME/.cabal/config
-  fi
 
 install:
 - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"