diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
--- a/.travis.yml
+++ /dev/null
@@ -1,107 +0,0 @@
-# This Travis job script has been generated by a script via
-#
-#   runghc make_travis_yml_2.hs 'text-ansi.cabal'
-#
-# For more information, see https://github.com/haskell-CI/haskell-ci
-#
-language: c
-sudo: false
-
-git:
-  submodules: false  # whether to recursively clone submodules
-
-cache:
-  directories:
-    - $HOME/.cabal/packages
-    - $HOME/.cabal/store
-
-before_cache:
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
-  # remove files that are regenerated by 'cabal update'
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.*
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/*.json
-  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.cache
-  - 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 $HOME/.cabal/packages/head.hackage
-
-matrix:
-  include:
-    - compiler: "ghc-8.6.2"
-    # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.6.2], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.4.4"
-    # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.4.4], sources: [hvr-ghc]}}
-    - compiler: "ghc-8.2.2"
-    # env: TEST=--disable-tests BENCH=--disable-benchmarks
-      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.4,ghc-8.2.2], sources: [hvr-ghc]}}
-
-before_install:
-  - HC=${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}
-  - 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 $pkg  | grep -vw -- text-ansi | sed 's/^/constraints: /' | sed 's/-[^-]*$/ 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:
-  # test that source-distributions can be generated
-  - cabal new-sdist all
-  - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
-  - cd ${DISTDIR} || false
-  - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;
-  - "printf 'packages: text-ansi-*/*.cabal\\n' > cabal.project"
-  - touch cabal.project.local
-  - "if ! $NOINSTALLEDCONSTRAINTS; then for pkg in $($HCPKG list --simple-output); do echo $pkg  | grep -vw -- text-ansi | sed 's/^/constraints: /' | sed 's/-[^-]*$/ 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 & run tests, build benchmarks
-  - cabal new-build -w ${HC} ${TEST} ${BENCH} all
-
-  # cabal check
-  - (cd text-ansi-* && cabal check)
-
-  # haddock
-  - 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 ["text-ansi.cabal"]
-# EOF
diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to the [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [0.1.0.1] - 2020-06-14
+
+### Changed
+- Relax `base` bounds
+
+### Removed
+- Drop `text-builder` dependency
+
 ## [0.1.0] - 2018-11-14
 
 ### Added
diff --git a/Data/Text/ANSI.hs b/Data/Text/ANSI.hs
--- a/Data/Text/ANSI.hs
+++ b/Data/Text/ANSI.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Data.Text.ANSI
@@ -53,14 +54,17 @@
   , overline
   ) where
 
+#if !MIN_VERSION_base(4,13,0)
 import Data.Semigroup ((<>))
+#endif
 import Data.Text
+import Data.Text.Lazy.Builder (Builder)
 import Data.Word (Word8)
 import Foreign.C (CInt(CInt))
 import System.IO.Unsafe (unsafePerformIO)
-import Text.Builder (Builder)
-
-import qualified Text.Builder as Builder
+import qualified Data.Text.Lazy as Text.Lazy
+import qualified Data.Text.Lazy.Builder as Builder
+import qualified Data.Text.Lazy.Builder.Int as Builder
 
 -- $intro
 --
@@ -188,11 +192,11 @@
 rgb r g b =
   surround
     ("38;2;" <>
-     Builder.unsignedDecimal r <>
+     Builder.decimal r <>
      semi <>
-     Builder.unsignedDecimal g <>
+     Builder.decimal g <>
      semi <>
-     Builder.unsignedDecimal b)
+     Builder.decimal b)
     "39"
 
 -- | RGB background.
@@ -201,11 +205,11 @@
 rgbBg r g b =
   surround
     ("48;2;" <>
-     Builder.unsignedDecimal r <>
+     Builder.decimal r <>
      semi <>
-     Builder.unsignedDecimal g <>
+     Builder.decimal g <>
      semi <>
-     Builder.unsignedDecimal b)
+     Builder.decimal b)
     "49"
 
 {-# INLINABLE bold            #-}
@@ -248,15 +252,15 @@
 {-# NOINLINE [1] surround #-}
 surround :: Builder -> Builder -> Text -> Text
 surround open close text
-  | isatty = Builder.run (esc <> open <> m <> Builder.text text <> esc <> close <> m)
+  | isatty = Text.Lazy.toStrict (Builder.toLazyText (esc <> open <> m <> Builder.fromText text <> esc <> close <> m))
   | otherwise = text
 
 esc :: Builder
 esc = "\ESC["
 
 m, semi :: Builder
-m    = Builder.char 'm'
-semi = Builder.char ';'
+m    = Builder.singleton 'm'
+semi = Builder.singleton ';'
 
 {-# NOINLINE isatty #-}
 isatty :: Bool
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
-[![Build Status](https://travis-ci.com/mitchellwrosen/text-ansi.svg?branch=master)](https://travis-ci.com/mitchellwrosen/text-ansi)
+[![GitHub CI](https://github.com/mitchellwrosen/text-ansi/workflows/CI/badge.svg)](https://github.com/mitchellwrosen/text-ansi/actions)
 [![Hackage](https://img.shields.io/hackage/v/text-ansi.svg)](https://hackage.haskell.org/package/text-ansi)
diff --git a/cabal.project b/cabal.project
new file mode 100644
--- /dev/null
+++ b/cabal.project
@@ -0,0 +1,5 @@
+packages: .
+index-state: 2020-06-14T23:29:31Z
+
+package text-ansi
+  ghc-options: -Werror
diff --git a/cabal.project.freeze b/cabal.project.freeze
new file mode 100644
--- /dev/null
+++ b/cabal.project.freeze
@@ -0,0 +1,6 @@
+constraints: any.array ==0.5.4.0,
+             any.binary ==0.8.8.0,
+             any.bytestring ==0.10.10.0,
+             any.containers ==0.6.2.1,
+             any.deepseq ==1.4.4.0,
+             any.rts ==1.0
diff --git a/text-ansi.cabal b/text-ansi.cabal
--- a/text-ansi.cabal
+++ b/text-ansi.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.2
 
 name: text-ansi
-version: 0.1.0
+version: 0.1.0.1
 category: Data
 synopsis: Text styling for ANSI terminals.
 description:
@@ -23,10 +23,10 @@
 license: BSD-3-Clause
 license-file: LICENSE
 build-type: Simple
-tested-with: GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.2
 
 extra-source-files:
-  .travis.yml
+  cabal.project
+  cabal.project.freeze
   CHANGELOG.md
   README.md
 
@@ -36,13 +36,19 @@
 
 library
   build-depends:
-      base ^>= 4.10 || ^>= 4.11 || ^>= 4.12
-    , text ^>= 1.0 || ^>= 1.1 || ^>= 1.2
-    , text-builder ^>= 0.6
+    base >= 4.9 && < 4.15,
+    text >= 1.0 && < 1.3,
   default-language:
     Haskell2010
   exposed-modules:
     Data.Text.ANSI
   ghc-options:
-    -Wall
-    -Wcompat
+    -Weverything
+    -Wno-implicit-prelude
+    -Wno-missing-import-lists
+    -Wno-missing-local-signatures
+    -Wno-unsafe
+  if impl(ghc >= 8.10)
+    ghc-options:
+      -Wno-missing-safe-haskell-mode
+      -Wno-prepositive-qualified-module