diff --git a/.travis.yml b/.travis.yml
index b117b95..d7f973b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,11 @@
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.3.20190521
+# version: 0.9.20200121
 #
+version: ~> 1.0
 language: c
+os: linux
 dist: xenial
 git:
   # whether to recursively clone submodules
@@ -18,6 +20,7 @@ cache:
   directories:
     - $HOME/.cabal/packages
     - $HOME/.cabal/store
+    - $HOME/.hlint
 before_cache:
   - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
   # remove files that are regenerated by 'cabal update'
@@ -27,56 +30,42 @@ before_cache:
   - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
   - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
   - rm -rfv $CABALHOME/packages/head.hackage
-matrix:
+jobs:
   include:
     - compiler: ghc-8.6.5
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.6.5","cabal-install-3.0"]}}
+      os: linux
     - compiler: ghc-8.4.4
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.4.4","cabal-install-2.4"]}}
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.4.4","cabal-install-3.0"]}}
+      os: linux
     - compiler: ghc-8.2.2
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.2.2","cabal-install-2.4"]}}
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.2.2","cabal-install-3.0"]}}
+      os: linux
     - compiler: ghc-8.0.2
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.0.2","cabal-install-2.4"]}}
+      addons: {"apt":{"sources":[{"sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu xenial main","key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286"}],"packages":["ghc-8.0.2","cabal-install-3.0"]}}
+      os: linux
 before_install:
   - HC=$(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|sed -E 's/([0-9]+)\.([0-9]+)\.([0-9]+).*/\1 * 10000 + \2 * 100 + \3/') ))
+  - "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+markoutput"
+  - CABAL="$CABAL -vnormal+nowrap"
   - set -o pipefail
-  - |
-    echo 'function blue(s) { printf "\033[0;34m" s "\033[0m " }'           >> .colorful.awk
-    echo 'BEGIN { state = "output"; }'                                     >> .colorful.awk
-    echo '/^-----BEGIN CABAL OUTPUT-----$/ { state = "cabal" }'            >> .colorful.awk
-    echo '/^-----END CABAL OUTPUT-----$/ { state = "output" }'             >> .colorful.awk
-    echo '!/^(-----BEGIN CABAL OUTPUT-----|-----END CABAL OUTPUT-----)/ {' >> .colorful.awk
-    echo '  if (state == "cabal") {'                                       >> .colorful.awk
-    echo '    print blue($0)'                                              >> .colorful.awk
-    echo '  } else {'                                                      >> .colorful.awk
-    echo '    print $0'                                                    >> .colorful.awk
-    echo '  }'                                                             >> .colorful.awk
-    echo '}'                                                               >> .colorful.awk
-  - cat .colorful.awk
-  - |
-    color_cabal_output () {
-      awk -f $TOP/.colorful.awk
-    }
-  - echo text | color_cabal_output
-install:
-  - ${CABAL} --version
-  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
   - TEST=--enable-tests
   - BENCH=--enable-benchmarks
-  - GHCHEAD=${GHCHEAD-false}
+  - 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
@@ -89,6 +78,12 @@ install:
     echo "  prefix: $CABALHOME"                         >> $CABALHOME/config
     echo "repository hackage.haskell.org"               >> $CABALHOME/config
     echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config
+install:
+  - ${CABAL} --version
+  - echo "$(${HC} --version) [$(${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
@@ -96,57 +91,59 @@ install:
   - rm -rf cabal.project cabal.project.local cabal.project.freeze
   - touch cabal.project
   - |
-    echo 'packages: "."' >> cabal.project
+    echo "packages: ." >> cabal.project
   - |
-    echo "write-ghc-environment-files: always" >> cabal.project
   - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(servant-ekg)$' || true) | sed 's/^/constraints: /' | sed 's/$/ 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 -w ${HC} ${TEST} ${BENCH} | color_cabal_output
+  - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH}
   - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
   - rm  cabal.project.freeze
-  - ${CABAL} v2-build -w ${HC} ${TEST} ${BENCH} --dep -j2 all | color_cabal_output
-  - ${CABAL} v2-build -w ${HC} --disable-tests --disable-benchmarks --dep -j2 all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} --dep -j2 all
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --dep -j2 all
 script:
   - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
   # Packaging...
-  - ${CABAL} v2-sdist all | color_cabal_output
+  - ${CABAL} v2-sdist all
   # Unpacking...
   - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
   - cd ${DISTDIR} || false
-  - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm       '{}' \;
+  - PKGDIR_servant_ekg="$(find . -maxdepth 1 -type d -regex '.*/servant-ekg-[0-9.]*')"
   # Generate cabal.project
   - rm -rf cabal.project cabal.project.local cabal.project.freeze
   - touch cabal.project
   - |
-    echo 'packages: "servant-ekg-*/*.cabal"' >> cabal.project
+    echo "packages: ${PKGDIR_servant_ekg}" >> cabal.project
   - |
-    echo "write-ghc-environment-files: always" >> cabal.project
   - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(servant-ekg)$' || true) | sed 's/^/constraints: /' | sed 's/$/ 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 -w ${HC} --disable-tests --disable-benchmarks all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
   # Building with tests and benchmarks...
   # build & run tests, build benchmarks
-  - ${CABAL} v2-build -w ${HC} ${TEST} ${BENCH} all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all
   # Testing...
-  - ${CABAL} v2-test -w ${HC} ${TEST} ${BENCH} all | color_cabal_output
+  - ${CABAL} v2-test $WITHCOMPILER ${TEST} ${BENCH} all
   # cabal check...
-  - (cd servant-ekg-* && ${CABAL} -vnormal check)
+  - (cd ${PKGDIR_servant_ekg} && ${CABAL} -vnormal check)
   # haddock...
-  - ${CABAL} v2-haddock -w ${HC} ${TEST} ${BENCH} all | color_cabal_output
+  - ${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 -w ${HC} --disable-tests --disable-benchmarks all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
   # Constraint sets
   - rm -rf cabal.project.local
   # Constraint set servant-0.15
-  - ${CABAL} v2-build -w ${HC} --disable-tests --disable-benchmarks --constraint='servant ==0.15.*' all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.15.*' all
   # Constraint set servant-0.16
-  - ${CABAL} v2-build -w ${HC} --disable-tests --disable-benchmarks --constraint='servant ==0.16.*' all | color_cabal_output
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.16.*' all
+  # Constraint set servant-0.17
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.17.*' all
 
-# REGENDATA ["--output=.travis.yml","--config=cabal.haskell-ci","cabal.project"]
+# REGENDATA ("0.9.20200121",["--output=.travis.yml","--config=cabal.haskell-ci","cabal.project"])
 # EOF
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index 3fd5349..f505a83 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -5,5 +5,9 @@ constraint-set servant-0.15
   constraints: servant ==0.15.*
 
 constraint-set servant-0.16
-  ghc: >= 8.0 && <8.8
+  ghc: >= 8.0 && <8.10
   constraints: servant ==0.16.*
+
+constraint-set servant-0.17
+  ghc: >= 8.0 && <8.10
+  constraints: servant ==0.17.*
diff --git a/lib/Servant/Ekg.hs b/lib/Servant/Ekg.hs
index 99e2b17..31c074a 100644
--- a/lib/Servant/Ekg.hs
+++ b/lib/Servant/Ekg.hs
@@ -168,6 +168,17 @@ instance ReflectMethod method => HasEndpoint (Verb method status cts a) where
     enumerateEndpoints _ = [APIEndpoint mempty method]
       where method = reflectMethod (Proxy :: Proxy method)
 
+#if MIN_VERSION_servant(0,17,0)
+instance ReflectMethod method => HasEndpoint (NoContentVerb method) where
+    getEndpoint _ req = case pathInfo req of
+        [] | requestMethod req == method -> Just (APIEndpoint [] method)
+        _                                -> Nothing
+      where method = reflectMethod (Proxy :: Proxy method)
+
+    enumerateEndpoints _ = [APIEndpoint mempty method]
+      where method = reflectMethod (Proxy :: Proxy method)
+#endif
+
 instance ReflectMethod method => HasEndpoint (Stream method status framing ct a) where
     getEndpoint _ req = case pathInfo req of
         [] | requestMethod req == method -> Just (APIEndpoint [] method)
diff --git a/servant-ekg.cabal b/servant-ekg.cabal
index 2905de3..fcebe2d 100644
--- a/servant-ekg.cabal
+++ b/servant-ekg.cabal
@@ -1,7 +1,6 @@
 cabal-version: >=1.10
 name:          servant-ekg
-version:       0.3
-x-revision:    1
+version:       0.3.1
 synopsis:      Helpers for using ekg with servant
 description:   Helpers for using ekg with servant, e.g.. counters per endpoint.
 license:       BSD3
@@ -30,7 +29,7 @@ library
     , ekg-core              >=0.1.1.4  && <0.2
     , http-types            >=0.12.2   && <0.13
     , hashable              >=1.2.7.0  && <1.4
-    , servant               >=0.14     && <0.17
+    , servant               >=0.14     && <0.18
     , text                  >=1.2.3.0  && <1.3
     , time                  >=1.6.0.1  && <1.9
     , unordered-containers  >=0.2.9.0  && <0.3