diff --git a/.appveyor.yml b/.appveyor.yml
new file mode 100644
index 0000000..880b8e1
--- /dev/null
+++ b/.appveyor.yml
@@ -0,0 +1,39 @@
+version: '{build}'
+
+image: Visual Studio 2015
+
+cache:
+  - NimBinaries
+
+matrix:
+  # We always want 32 and 64-bit compilation
+  fast_finish: false
+
+platform:
+  - x86
+  - x64
+
+# when multiple CI builds are queued, the tested commit needs to be in the last X commits cloned with "--depth X"
+clone_depth: 10
+
+install:
+  # use the newest versions documented here: https://www.appveyor.com/docs/windows-images-software/#mingw-msys-cygwin
+  - IF "%PLATFORM%" == "x86" SET PATH=C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin;%PATH%
+  - IF "%PLATFORM%" == "x64" SET PATH=C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;%PATH%
+
+  # build nim from our own branch - this to avoid the day-to-day churn and
+  # regressions of the fast-paced Nim development while maintaining the
+  # flexibility to apply patches
+  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
+  - env MAKE="mingw32-make -j2" ARCH_OVERRIDE=%PLATFORM% bash build_nim.sh Nim csources dist/nimble NimBinaries
+  - SET PATH=%CD%\Nim\bin;%PATH%
+
+build_script:
+  - cd C:\projects\%APPVEYOR_PROJECT_SLUG%
+  - nimble install -y
+
+test_script:
+  - nimble test
+
+deploy: off
+
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..9ee1b9e
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,27 @@
+language: c
+
+# https://docs.travis-ci.com/user/caching/
+cache:
+  directories:
+    - NimBinaries
+
+git:
+  # when multiple CI builds are queued, the tested commit needs to be in the last X commits cloned with "--depth X"
+  depth: 10
+
+os:
+  - linux
+  - osx
+
+install:
+  # build nim from our own branch - this to avoid the day-to-day churn and
+  # regressions of the fast-paced Nim development while maintaining the
+  # flexibility to apply patches
+  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
+  - env MAKE="make -j2" bash build_nim.sh Nim csources dist/nimble NimBinaries
+  - export PATH=$PWD/Nim/bin:$PATH
+
+script:
+  - nimble install -y
+  - nimble test
+