diff --git a/.travis.yml b/.travis.yml
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 # This Travis job script has been generated by a script via
 #
-#   make_travis_yml_2.hs 'dwergaz.cabal'
+#   runghc make_travis_yml_2.hs 'dwergaz.cabal'
 #
 # For more information, see https://github.com/hvr/multi-ghc-travis
 #
@@ -24,72 +24,89 @@
   - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar
   - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar.idx
 
+  - rm -rfv $HOME/.cabal/packages/head.hackage
+
 matrix:
   include:
-    - compiler: "ghc-7.10.3"
+    - compiler: "ghc-8.4.3"
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-7.10.3], sources: [hvr-ghc]}}
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.4.3], sources: [hvr-ghc]}}
+    - compiler: "ghc-8.2.2"
+    # env: TEST=--disable-tests BENCH=--disable-benchmarks
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.2.2], sources: [hvr-ghc]}}
     - compiler: "ghc-8.0.2"
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-8.0.2], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.2.1"
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-8.0.2], sources: [hvr-ghc]}}
+    - compiler: "ghc-7.10.3"
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-8.2.1], sources: [hvr-ghc]}}
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.2,ghc-7.10.3], sources: [hvr-ghc]}}
 
 before_install:
- - HC=${CC}
- - HCPKG=${HC/ghc/ghc-pkg}
- - unset CC
- - PATH=/opt/ghc/bin:/opt/ghc-ppa-tools/bin:$PATH
- - PKGNAME='dwergaz'
+  - HC=${CC}
+  - HCPKG=${HC/ghc/ghc-pkg}
+  - unset CC
+  - ROOTDIR=$(pwd)
+  - mkdir -p $HOME/.local/bin
+  - "PATH=/opt/ghc/bin:/opt/ghc-ppa-tools/bin:$HOME/local/bin:$PATH"
+  - HCNUMVER=$(( $(${HC} --numeric-version|sed -E 's/([0-9]+)\.([0-9]+)\.([0-9]+).*/\1 * 10000 + \2 * 100 + \3/') ))
+  - echo $HCNUMVER
 
 install:
- - cabal --version
- - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
- - BENCH=${BENCH---enable-benchmarks}
- - TEST=${TEST---enable-tests}
- - HADDOCK=${HADDOCK-true}
- - INSTALLED=${INSTALLED-true}
- - travis_retry cabal update -v
- - sed -i.bak 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
- - rm -fv cabal.project.local
- - "echo 'packages: .' > cabal.project"
- - rm -f cabal.project.freeze
- - cabal new-build -w ${HC} ${TEST} ${BENCH} --dep -j2 all
- - cabal new-build -w ${HC} --disable-tests --disable-benchmarks --dep -j2 all
+  - cabal --version
+  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - BENCH=${BENCH---enable-benchmarks}
+  - TEST=${TEST---enable-tests}
+  - HADDOCK=${HADDOCK-true}
+  - UNCONSTRAINED=${UNCONSTRAINED-true}
+  - NOINSTALLEDCONSTRAINTS=${NOINSTALLEDCONSTRAINTS-false}
+  - GHCHEAD=${GHCHEAD-false}
+  - travis_retry cabal update -v
+  - "sed -i.bak 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config"
+  - rm -fv cabal.project cabal.project.local
+  - grep -Ev -- '^\s*--' ${HOME}/.cabal/config | grep -Ev '^\s*$'
+  - "printf 'packages: \".\"\\n' > cabal.project"
+  - touch cabal.project.local
+  - "if ! $NOINSTALLEDCONSTRAINTS; then for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/^/constraints: /' | sed 's/-[^-]*$/ installed/' >> cabal.project.local; done; fi"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  - if [ -f "./configure.ac" ]; then
+      (cd "." && autoreconf -i);
+    fi
+  - rm -f cabal.project.freeze
+  - cabal new-build -w ${HC} ${TEST} ${BENCH} --project-file="cabal.project" --dep -j2 all
+  - cabal new-build -w ${HC} --disable-tests --disable-benchmarks --project-file="cabal.project" --dep -j2 all
+  - rm -rf .ghc.environment.* "."/dist
+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
 
 # Here starts the actual work to be performed for the package under test;
 # any command which exits with a non-zero exit code causes the build to fail.
 script:
- - if [ -f configure.ac ]; then autoreconf -i; fi
- - rm -rf .ghc.environment.* dist/
- - cabal sdist # test that a source-distribution can be generated
- - cd dist/
- - SRCTAR=(${PKGNAME}-*.tar.gz)
- - SRC_BASENAME="${SRCTAR/%.tar.gz}"
- - tar -xvf "./$SRC_BASENAME.tar.gz"
- - cd "$SRC_BASENAME/"
-## from here on, CWD is inside the extracted source-tarball
- - rm -fv cabal.project.local
- - "echo 'packages: .' > cabal.project"
- # this builds all libraries and executables (without tests/benchmarks)
- - rm -f cabal.project.freeze
- - cabal new-build -w ${HC} --disable-tests --disable-benchmarks all
- # this builds all libraries and executables (including tests/benchmarks)
- # - rm -rf ./dist-newstyle
+  # test that source-distributions can be generated
+  - (cd "." && cabal sdist)
+  - mv "."/dist/dwergaz-*.tar.gz ${DISTDIR}/
+  - cd ${DISTDIR} || false
+  - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - "printf 'packages: dwergaz-*/*.cabal\\n' > cabal.project"
+  - touch cabal.project.local
+  - "if ! $NOINSTALLEDCONSTRAINTS; then for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/^/constraints: /' | sed 's/-[^-]*$/ installed/' >> cabal.project.local; done; fi"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  # this builds all libraries and executables (without tests/benchmarks)
+  - cabal new-build -w ${HC} --disable-tests --disable-benchmarks all
 
- # Build with installed constraints for packages in global-db
- - if $INSTALLED; then
-     echo cabal new-build -w ${HC} --disable-tests --disable-benchmarks $(${HCPKG} list --global --simple-output --names-only | sed 's/\([a-zA-Z0-9-]\{1,\}\) */--constraint="\1 installed" /g') all | sh;
-   else echo "Not building with installed constraints"; fi
+  # build & run tests, build benchmarks
+  - cabal new-build -w ${HC} ${TEST} ${BENCH} all
+  - if [ "x$TEST" = "x--enable-tests" ]; then cabal new-test -w ${HC} ${TEST} ${BENCH} all; fi
 
- # build & run tests, build benchmarks
- - cabal new-build -w ${HC} ${TEST} ${BENCH} all
- - if [ "x$TEST" = "x--enable-tests" ]; then cabal new-test -w ${HC} ${TEST} all; fi
+  # cabal check
+  - (cd dwergaz-* && cabal check)
 
- # haddock
- - rm -rf ./dist-newstyle
- - if $HADDOCK; then cabal new-haddock -w ${HC} --disable-tests --disable-benchmarks all; else echo "Skipping haddock generation";fi
+  # haddock
+  - rm -rf ./dist-newstyle
+  - if $HADDOCK; then cabal new-haddock -w ${HC} ${TEST} ${BENCH} all; else echo "Skipping haddock generation";fi
+
+  # Build without installed constraints for packages in global-db
+  - if $UNCONSTRAINED; then rm -f cabal.project.local; echo cabal new-build -w ${HC} --disable-tests --disable-benchmarks all; else echo "Not building without installed constraints"; fi
 
 # REGENDATA ["dwergaz.cabal"]
 # EOF
diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -15,3 +15,7 @@
 ## 0.2.0.1  -- 2017-08-12
 
 * Loosened constraints on `base` for compatibility with GHC 8.2.1.
+
+## 0.2.0.2  -- 2018-06-23
+
+* Loosened constraints on `base` for compatibility with GHC 8.4.3.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2017, Henry Till
+Copyright (c) 2017-2018, Henry Till
 
 All rights reserved.
 
diff --git a/dwergaz.cabal b/dwergaz.cabal
--- a/dwergaz.cabal
+++ b/dwergaz.cabal
@@ -2,19 +2,19 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dwergaz
-version:             0.2.0.1
+version:             0.2.0.2
 synopsis:            A minimal testing library
-description:         A minimal testing library
+description:         dwergaz is a minimal testing library with no external dependencies.
 license:             BSD3
 license-file:        LICENSE
 author:              Henry Till
 maintainer:          henrytill@gmail.com
 homepage:            https://github.com/xngns/dwergaz
-copyright:           Copyright (c) 2017, Henry Till
+copyright:           Copyright (c) 2017-2018, Henry Till
 category:            Testing
 build-type:          Simple
 cabal-version:       >=1.10
-tested-with:         GHC == 7.10.3, GHC == 8.0.2, GHC == 8.2.1
+tested-with:         GHC == 7.10.3, GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.3
 
 extra-source-files:
   .gitignore
@@ -30,7 +30,7 @@
   exposed-modules:     Test.Dwergaz
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.8 && <4.11
+  build-depends:       base >=4.8 && <4.12
   hs-source-dirs:      src
   default-language:    Haskell2010
   ghc-options:         -Wall
@@ -38,7 +38,7 @@
 test-suite tests
   type:                exitcode-stdio-1.0
   main-is:             Main.hs
-  build-depends:       base >=4.8 && <4.11
+  build-depends:       base >=4.8 && <4.12
                      , dwergaz
   hs-source-dirs:      tests
   default-language:    Haskell2010
diff --git a/src/Test/Dwergaz.hs b/src/Test/Dwergaz.hs
--- a/src/Test/Dwergaz.hs
+++ b/src/Test/Dwergaz.hs
@@ -12,13 +12,13 @@
 --
 -- See the <https://github.com/xngns/dwergaz/blob/master/tests/Main.hs tests> for a usage example.
 --
-
 module Test.Dwergaz
   ( Test(..)
   , Result
   , isPassed
   , runTest
   ) where
+
 
 data Test where
   Predicate :: (Eq a, Show a) => String -> (a -> Bool) -> a -> Test
diff --git a/tests/Main.hs b/tests/Main.hs
--- a/tests/Main.hs
+++ b/tests/Main.hs
@@ -1,9 +1,11 @@
-module Main where
+module Main (main) where
 
-import Control.Monad (unless)
-import Data.Either (isLeft, isRight)
-import System.Exit (exitFailure)
-import Test.Dwergaz
+import           Control.Monad (unless)
+import           Data.Either   (isLeft, isRight)
+import           System.Exit   (exitFailure)
+
+import           Test.Dwergaz
+
 
 testFun01 :: a -> String
 testFun01 = const "quux"
