diff --git a/.gitignore b/.gitignore
index 510f52aa..615382e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,49 @@
+# object files
+*.a
+*.o
+*.so
+
+# haskell stuff
+.ghc.environment.*
+dist
+dist-*
+cabal-dev
+*.chi
+*.chs.h
+*.dyn_o
+*.dyn_hi
+*.prof
+*.hp
+*.eventlog
+.cabal-sandbox/
+cabal.sandbox.config
+cabal.config
+cabal.project.local
+.HTF/
 .stack-work/
-log/
-.idea/
+stack.yaml.lock
+
+# vim stuff
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+*~
+
+# nix stuff
+result
+result-*
+*.hi
+
+# make/latexmk stuff
+.makefile
+*.aux
+*.fdb_latexmk
+*.fls
+*.log
+*.out
+
+# misc
+tags
+log
+.idea
diff --git a/.travis.yml b/.travis.yml
index 339bc7c1..dadb9cdf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,92 +1,140 @@
-# This file has been generated -- see https://github.com/hvr/multi-ghc-travis
+# This Travis job script has been generated by a script via
+#
+#   haskell-ci 'travis' 'duckling.cabal'
+#
+# To regenerate the script (for example after adjusting tested-with) run
+#
+#   haskell-ci regenerate
+#
+# For more information, see https://github.com/haskell-CI/haskell-ci
+#
+# version: 0.10.3
+#
+version: ~> 1.0
 language: c
-sudo: false
-
+os: linux
+dist: xenial
+git:
+  # whether to recursively clone submodules
+  submodules: false
 cache:
   directories:
-    - $HOME/.cabsnap
     - $HOME/.cabal/packages
-
+    - $HOME/.cabal/store
+    - $HOME/.hlint
 before_cache:
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.tar
-
-matrix:
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
+  # remove files that are regenerated by 'cabal update'
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/00-index.*
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/*.json
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
+  - rm -rfv $CABALHOME/packages/head.hackage
+jobs:
   include:
-    # crashes in travis because 2 versions of unix get installed and
-    # when text-show tries to use TH the wrong one gets linked
-    # - env: CABALVER=1.24 GHCVER=7.10.3 HAPPYVER=1.19.5 BUILD=cabal
-    #   compiler: ": #GHC 7.10.3"
-    #   addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.3,happy-1.19.5], sources: [hvr-ghc]}}
-    - env: CABALVER=1.24 GHCVER=8.0.2
-      compiler: ": #GHC 8.0.2"
-      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2,happy-1.19.5], sources: [hvr-ghc]}}
-    - env: CABALVER=2.0 GHCVER=8.2.2
-      compiler: ": #GHC 8.2.2"
-      addons: {apt: {packages: [cabal-install-2.0,ghc-8.2.2,happy-1.19.5], sources: [hvr-ghc]}}
-    - env: CABALVER=2.0 GHCVER=8.6.3
-      compiler: ": #GHC 8.6.3"
-      addons: {apt: {packages: [cabal-install-2.0,ghc-8.6.3,happy-1.19.5], sources: [hvr-ghc]}}
-
+    - compiler: ghc-8.6.5
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.6.5","cabal-install-3.2"]}}
+      os: linux
+    - compiler: ghc-8.4.4
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.4.4","cabal-install-3.2"]}}
+      os: linux
 before_install:
- - unset CC
- - export HAPPYVER=1.19.5
- - export PATH=$HOME/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
- - export PATH=/opt/happy/$HAPPYVER/bin:$PATH
-
+  - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')
+  - WITHCOMPILER="-w $HC"
+  - HADDOCK=$(echo "/opt/$CC/bin/haddock" | sed 's/-/\//')
+  - HCPKG="$HC-pkg"
+  - unset CC
+  - CABAL=/opt/ghc/bin/cabal
+  - CABALHOME=$HOME/.cabal
+  - export PATH="$CABALHOME/bin:$PATH"
+  - TOP=$(pwd)
+  - "HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')"
+  - echo $HCNUMVER
+  - CABAL="$CABAL -vnormal+nowrap"
+  - set -o pipefail
+  - TEST=--enable-tests
+  - BENCH=--enable-benchmarks
+  - HEADHACKAGE=false
+  - rm -f $CABALHOME/config
+  - |
+    echo "verbose: normal +nowrap +markoutput"          >> $CABALHOME/config
+    echo "remote-build-reporting: anonymous"            >> $CABALHOME/config
+    echo "write-ghc-environment-files: always"          >> $CABALHOME/config
+    echo "remote-repo-cache: $CABALHOME/packages"       >> $CABALHOME/config
+    echo "logs-dir:          $CABALHOME/logs"           >> $CABALHOME/config
+    echo "world-file:        $CABALHOME/world"          >> $CABALHOME/config
+    echo "extra-prog-path:   $CABALHOME/bin"            >> $CABALHOME/config
+    echo "symlink-bindir:    $CABALHOME/bin"            >> $CABALHOME/config
+    echo "installdir:        $CABALHOME/bin"            >> $CABALHOME/config
+    echo "build-summary:     $CABALHOME/logs/build.log" >> $CABALHOME/config
+    echo "store-dir:         $CABALHOME/store"          >> $CABALHOME/config
+    echo "install-dirs user"                            >> $CABALHOME/config
+    echo "  prefix: $CABALHOME"                         >> $CABALHOME/config
+    echo "repository hackage.haskell.org"               >> $CABALHOME/config
+    echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config
 install:
- - cabal --version
- - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
- - if [ -f $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz ];
-   then
-     zcat $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz >
-          $HOME/.cabal/packages/hackage.haskell.org/00-index.tar;
-   fi
- - travis_retry cabal update -v
- - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
- - cabal install --only-dependencies --enable-tests --enable-benchmarks --dry -v > installplan.txt
- - sed -i -e '1,/^Resolving /d' installplan.txt; cat installplan.txt
-
-# check whether current requested install-plan matches cached package-db snapshot
- - if diff -u $HOME/.cabsnap/installplan.txt installplan.txt;
-   then
-     echo "cabal build-cache HIT";
-     rm -rfv .ghc;
-     cp -a $HOME/.cabsnap/ghc $HOME/.ghc;
-     cp -a $HOME/.cabsnap/lib $HOME/.cabsnap/share $HOME/.cabsnap/bin $HOME/.cabal/;
-   else
-     echo "cabal build-cache MISS";
-     rm -rf $HOME/.cabsnap;
-     mkdir -p $HOME/.ghc $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin;
-     cabal install -j1 --only-dependencies --enable-tests --enable-benchmarks;
-   fi
-
-# snapshot package-db on cache miss
- - if [ ! -d $HOME/.cabsnap ];
-   then
-      echo "snapshotting package-db to build-cache";
-      mkdir $HOME/.cabsnap;
-      cp -a $HOME/.ghc $HOME/.cabsnap/ghc;
-      cp -a $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin installplan.txt $HOME/.cabsnap/;
-   fi
-
-# 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.
+  - ${CABAL} --version
+  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - |
+    echo "program-default-options"                >> $CABALHOME/config
+    echo "  ghc-options: $GHCJOBS +RTS -M6G -RTS" >> $CABALHOME/config
+  - cat $CABALHOME/config
+  - rm -fv cabal.project cabal.project.local cabal.project.freeze
+  - travis_retry ${CABAL} v2-update -v
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: ." >> cabal.project
+  - echo 'package duckling' >> cabal.project
+  - "echo '  ghc-options: -Werror=missing-methods' >> cabal.project"
+  - |
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(duckling)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  - if [ -f "./configure.ac" ]; then (cd "." && autoreconf -i); fi
+  - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH}
+  - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
+  - rm  cabal.project.freeze
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} --dep -j2 all
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --dep -j2 all
 script:
- - if [ -f configure.ac ]; then autoreconf -i; fi
- - cabal configure --enable-tests -v2  # -v2 provides useful information for debugging
- - cabal build -j1 # this builds all libraries and executables (including tests/benchmarks)
- - travis_wait cabal test -j1 --show-details=always
- - cabal check
- - cabal sdist   # tests that a source-distribution can be generated
-
-# Check that the resulting source distribution can be built & installed.
-# If there are no other `.tar.gz` files in `dist`, this can be even simpler:
-# `cabal install --force-reinstalls dist/*-*.tar.gz`
-
-# Building it again doubles the time and it's currently timing out on Travis.
-# It's also not that useful at the moment.
-#- SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
-#   (cd dist && cabal install --force-reinstalls "$SRC_TGZ")
+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
+  # Packaging...
+  - ${CABAL} v2-sdist all
+  # Unpacking...
+  - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
+  - cd ${DISTDIR} || false
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm       '{}' \;
+  - PKGDIR_duckling="$(find . -maxdepth 1 -type d -regex '.*/duckling-[0-9.]*')"
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: ${PKGDIR_duckling}" >> cabal.project
+  - echo 'package duckling' >> cabal.project
+  - "echo '  ghc-options: -Werror=missing-methods' >> cabal.project"
+  - |
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(duckling)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  # Building...
+  # this builds all libraries and executables (without tests/benchmarks)
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
+  # Building with tests and benchmarks...
+  # build & run tests, build benchmarks
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all
+  # Testing...
+  - ${CABAL} v2-test $WITHCOMPILER ${TEST} ${BENCH} all
+  # cabal check...
+  - (cd ${PKGDIR_duckling} && ${CABAL} -vnormal check)
+  # haddock...
+  - ${CABAL} v2-haddock $WITHCOMPILER --with-haddock $HADDOCK ${TEST} ${BENCH} all
+  # Building without installed constraints for packages in global-db...
+  - rm -f cabal.project.local
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
 
+# REGENDATA ("0.10.3",["travis","duckling.cabal"])
 # EOF
diff --git a/dist-newstyle/cache/config b/dist-newstyle/cache/config
deleted file mode 100644
index 2ab20b66..00000000
Binary files a/dist-newstyle/cache/config and /dev/null differ
diff --git a/duckling.cabal b/duckling.cabal
index d9fe499f..22a9e09d 100644
--- a/duckling.cabal
+++ b/duckling.cabal
@@ -22,9 +22,8 @@ build-type:          Simple
 stability:           alpha
 cabal-version:       >=1.10
 tested-with:
-  GHC==8.0.2,
-  GHC==8.2.2,
-  GHC==8.6.3
+  GHC==8.4.4,
+  GHC==8.6.5
 
 extra-source-files:    README.md
 
@@ -829,17 +828,17 @@ library
   build-depends:       base                  >= 4.8.2 && < 5.0
                      , array                 >= 0.5.1.1 && < 0.6
                      , attoparsec            >= 0.13.1.0 && < 0.14
-                     , aeson                 >= 0.11.3.0 && < 1.5
+                     , aeson                 >= 0.11.3.0 && < 1.6
                      , bytestring            >= 0.10.6.0 && < 0.11
                      , containers            >= 0.5.6.2 && < 0.7
                      , deepseq               >= 1.4.1.1 && < 1.5
                      , dependent-sum         >= 0.3.2.2 && < 0.5
-                     , extra                 >= 1.4.10 && < 1.7
-                     , hashable              >= 1.2.4.0 && < 1.3
-                     , regex-base            >= 0.93.2 && < 0.94
-                     , regex-pcre            >= 0.94.4 && < 0.95
+                     , extra                 >= 1.4.10 && < 1.8
+                     , hashable              >= 1.2.4.0 && < 1.4
+                     , regex-base            >= 0.93.2 && < 0.95
+                     , regex-pcre            >= 0.94.4 && < 0.96
                      , text                  >= 1.2.2.1 && < 1.3
-                     , text-show             >= 2.1.2 && < 3.8
+                     , text-show             >= 2.1.2 && < 3.9
                      , time                  >= 1.5.0.1 && < 2
                      , timezone-series       >= 0.1.5.1 && < 0.2
                      , unordered-containers  >= 0.2.7.2 && < 0.3
@@ -1160,7 +1159,7 @@ executable duckling-example-exe
                      , text
                      , text-show
                      , time
-                     , timezone-olson        >= 0.1.7 && < 0.2
+                     , timezone-olson        >= 0.1.7 && < 0.3
                      , timezone-series
                      , unordered-containers
   default-language:    Haskell2010
@@ -1195,7 +1194,7 @@ executable duckling-request-sample
                      , filepath              >= 1.4.0.0 && < 1.5
                      , text
                      , time
-                     , timezone-olson        >= 0.1.7 && < 0.2
+                     , timezone-olson        >= 0.1.7 && < 0.3
                      , timezone-series
                      , unordered-containers
   default-language:    Haskell2010
@@ -1214,7 +1213,7 @@ executable duckling-expensive
                      , filepath              >= 1.4.0.0 && < 1.5
                      , text
                      , time
-                     , timezone-olson        >= 0.1.7 && < 0.2
+                     , timezone-olson        >= 0.1.7 && < 0.3
                      , timezone-series
                      , unordered-containers
   default-language:    Haskell2010
diff --git a/stack.yaml b/stack.yaml
index e68eb916..30fee675 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-9.10
+resolver: lts-14.20
 
 packages:
 - '.'