diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..3319b667
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,78 @@
+version: 2.1
+
+jobs:
+  build:
+    docker:
+      - image: lycantropos/cmake:3.9.5
+    parameters:
+      benchmarks:
+        default: "OFF"
+        type: string
+      build-type:
+        default: Release
+        type: string
+      coverage:
+        default: "OFF"
+        type: string
+      cxx-ver:
+        default: "11"
+        type: string
+      samples:
+        default: "OFF"
+        type: string
+      static:
+        default: "ON"
+        type: string
+    steps:
+      - checkout
+      - run: cmake -D XLNT_CXX_LANG=<< parameters.cxx-ver >> -D STATIC=<< parameters.static >> -D BENCHMARKS=<< parameters.benchmarks >> -D SAMPLES=<< parameters.samples >> -D COVERAGE=<< parameters.coverage >> -D CMAKE_BUILD_TYPE=<< parameters.build-type >> .
+      - run: cmake --build . -- -j2
+      - run: ./tests/xlnt.test
+      - when:
+          condition:
+            equal: [ "ON", << parameters.samples >> ]
+          steps:
+            - run: ./samples/sample-decrypt
+            - run: ./samples/sample-img2xlsx ./samples/data/penguin.jpg img.xlsx
+            - run: ./samples/sample-documentation
+      - when:
+          condition:
+            equal: [ "ON", << parameters.benchmarks >> ]
+          steps:
+            - run: ./benchmarks/benchmark-styles
+            - run: ./benchmarks/benchmark-writer
+      - when:
+          condition:
+            equal: [ "ON", << parameters.coverage >> ]
+          steps:
+            - run: lcov --directory source/CMakeFiles/xlnt.dir --capture --output-file coverage.info --base-directory ../source --no-external --gcov-tool /usr/bin/gcov-6
+            - run: lcov --output-file coverage.info --remove coverage.info source/detail/serialization/miniz.cpp
+            - run: i=$(dirname $(pwd))
+            - run: sed -i "s|$i/||" coverage.info
+            - run: cd ..
+            - run: coveralls-lcov build/coverage.info
+
+workflows:
+  build:
+    jobs:
+      - build:
+          name: tests
+          matrix:
+            parameters:
+              cxx-ver:
+                - "11"
+                - "17"
+              build-type:
+                - Release
+                - Debug
+              static:
+                - "ON"
+                - "OFF"
+      - build:
+          name: samples-benchmarks-coverage
+          cxx-ver: "11"
+          build-type: Debug
+          static: "ON"
+          samples: "ON"
+          benchmarks: "ON"
+          coverage: "OFF"
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 46619412..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,231 +0,0 @@
-# cpp takes longer
-language: minimal
-sudo: false
-dist: trusty
-
-git:
-  depth: false
-
-notifications:
-  email: false
-
-# set up build matrix
-matrix:
-  include:
-    # ============= GCC ==================
-    # gcc-5, c++11, release build, dynamic linking
-    - os: linux
-      compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-5
-      env:
-        - CXX_COMPILER=g++-5
-        - C_COMPILER=gcc-5
-        - CXX_VER=11
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=OFF
-        - SAMPLES=OFF
-        - BENCHMARKS=OFF
-        - RELEASE=OFF
-
-    # ============= GCC ==================
-    # gcc-6, c++11, release build, dynamic linking
-    - os: linux
-      compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-6
-      env:
-        - CXX_COMPILER=g++-6
-        - C_COMPILER=gcc-6
-        - CXX_VER=11
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=OFF
-        - SAMPLES=OFF
-        - BENCHMARKS=OFF
-        - RELEASE=OFF
-
-    # gcc-7, c++14, release build, static linking
-    - os: linux
-      compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-7
-      env:
-        - CXX_COMPILER=g++-7
-        - C_COMPILER=gcc-7
-        - CXX_VER=14
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=ON
-        - SAMPLES=OFF
-        - BENCHMARKS=OFF
-        - RELEASE=OFF
-
-    # gcc-8, c++17, release build, static linking, samples + benchmarks compiled and run
-    - os: linux
-      compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-8
-      env:
-        - CXX_COMPILER=g++-8
-        - C_COMPILER=gcc-8
-        - CXX_VER=17
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=ON
-        - SAMPLES=ON
-        - BENCHMARKS=ON
-        - RELEASE=ON
-
-    # =========== CLANG =============
-    # clang 4, c++11, release build, dynamic linking
-    - os: linux
-      compiler: clang
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-4.0
-          packages:
-            - clang-4.0
-      env:
-        - CXX_COMPILER=clang++-4.0
-        - C_COMPILER=clang-4.0
-        - CXX_VER=11
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=OFF
-        - SAMPLES=OFF
-        - BENCHMARKS=OFF
-        - RELEASE=OFF
-
-    # clang 5, c++14, release build, dynamic linking
-    - os: linux
-      compiler: clang
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-5.0
-          packages:
-            - clang-5.0
-      env:
-        - CXX_COMPILER=clang++-5.0
-        - C_COMPILER=clang-5.0
-        - CXX_VER=14
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=ON
-        - SAMPLES=OFF
-        - BENCHMARKS=OFF
-        - RELEASE=OFF
-
-    # clang 6, c++17, release build, static linking, samples + benchmarks compiled and run
-    - os: linux
-      compiler: clang
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-6.0
-          packages:
-            - clang-6.0
-      env:
-        - CXX_COMPILER=clang++-6.0
-        - C_COMPILER=clang-6.0
-        - CXX_VER=17
-        - BUILD_TYPE=Release
-        - COVERAGE=OFF
-        - STATIC=ON
-        - SAMPLES=ON
-        - BENCHMARKS=ON
-        - RELEASE=ON
-
-    # ============= CODE COVERAGE ===============
-    # gcc-6, c++11, debug build, static linking, code coverage enabled
-    - os: linux
-      compiler: gcc
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-6
-            - lcov
-      env:
-        - CXX_COMPILER=g++-6
-        - C_COMPILER=gcc-6
-        - CXX_VER=11
-        - BUILD_TYPE=Debug
-        - COVERAGE=ON
-        - STATIC=ON
-        - SAMPLES=OFF
-
-before_install:
-  - export CC=${C_COMPILER}
-  - export CXX=${CXX_COMPILER}
-
-install:
-  - |
-    if [[ "${COVERAGE}" == "ON" ]]; then
-      gem install coveralls-lcov; 
-    fi
-  - ${CXX} --version
-  - cmake --version
-
-script:
-  - mkdir build
-  - cd build
-  - cmake .. -DXLNT_CXX_LANG=${CXX_VER} -DSTATIC=$STATIC -DBENCHMARKS=$BENCHMARKS -DSAMPLES=$SAMPLES -DCOVERAGE=$COVERAGE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DRELEASE=$RELEASE
-  - cmake --build . -- -j2
-  - ./tests/xlnt.test
-  - echo "samples" && echo 'travis_fold:start:samples'
-  - if [[ "${SAMPLES}" == "ON" ]]; then ./samples/sample-decrypt; fi
-  - if [[ "${SAMPLES}" == "ON" ]]; then ./samples/sample-img2xlsx "../samples/data/cafe.jpg" "img.xlsx"; fi
-  - if [[ "${SAMPLES}" == "ON" ]]; then ./samples/sample-documentation; fi
-  - echo 'travis_fold:end:samples'
-  - echo "benchmarks" && echo 'travis_fold:start:benchmarks'
-  - if [[ "${BENCHMARKS}" == "ON" ]]; then ./benchmarks/benchmark-styles; fi
-  - if [[ "${BENCHMARKS}" == "ON" ]]; then ./benchmarks/benchmark-writer; fi
-  - echo 'travis_fold:end:benchmarks'
-
-
-after_success:
- - |
-   if [[ "${COVERAGE}" == "ON" ]]; then
-     lcov --directory source/CMakeFiles/xlnt.dir --capture --output-file coverage.info --base-directory ../source --no-external --gcov-tool /usr/bin/gcov-6
-     lcov --output-file coverage.info --remove coverage.info source/detail/serialization/miniz.cpp
-     i=$(dirname $(pwd))
-     sed -i "s|$i/||" coverage.info
-     cd ..
-     coveralls-lcov build/coverage.info
-   fi
-
-deploy:
-  provider: releases
-  api_key:
-    secure: "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"
-  file_glob: true
-  file: build/*.tar.gz
-  skip_cleanup: true
-  overwite: true
-  on:
-    repo: tfussell/xlnt
-    tags: true
diff --git a/samples/data/penguin.jpg b/samples/data/penguin.jpg
new file mode 100644
index 00000000..7bbaac24
Binary files /dev/null and b/samples/data/penguin.jpg differ