diff --git a/.github/workflows/check_build.yaml b/.github/workflows/check_build.yaml
new file mode 100644
index 0000000..de33d3d
--- /dev/null
+++ b/.github/workflows/check_build.yaml
@@ -0,0 +1,43 @@
+name: Check Builds
+
+on:
+  push:
+    paths:
+        - src/**
+        - main.c
+        - Makefile
+        - CMakeLists.txt
+        - .github/workflows/check-build.yaml
+
+jobs:
+  ubuntu-build:
+    runs-on: ubuntu-latest-4-cores
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: CMake
+        run: cmake -S . -B build
+      - name: Build
+        run: cmake --build build
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: Cosmo-Ubuntu
+          path: bin
+
+  windows-build:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Create CMake build files
+        run: cmake -B build -DCMAKE_BUILD_TYPE=MinSizeRel
+      - name: Check compilation
+        run: cmake --build build --config MinSizeRel
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: Cosmo-Windows
+          path: winbin
\ No newline at end of file
diff --git a/README.md b/README.md
index 7b915ec..44dcdc5 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # Cosmo
-[![AppVeyor](https://ci.appveyor.com/api/projects/status/github/CPunch/Cosmo?svg=true)](https://ci.appveyor.com/project/CPunch/Cosmo)
+[![Check Build](https://github.com/CPunch/Cosmo/actions/workflows/check-build.yaml/badge.svg?branch=main)](https://github.com/CPunch/Cosmo/actions/workflows/check-build.yaml)
 
 ## Usage
 
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 509f70e..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-version: 'cosmo-0.1.{build}'
-
-# we compile every commit under all branches
-#branch:
-# only:
-#  - main
-
-# only run CI if we changed actual code
-only_commits:
-  files:
-    - src/
-    - main.c
-    - Makefile
-    - CMakeLists.txt
-    - appveyor.yml
-
-# images we're using
-image:
-  - Ubuntu2004
-
-platform:
-  - x64
-
-install:
-  - sudo apt install clang cmake -y
-
-build_script:
-  - make && ./bin/cosmo examples/testsuite.cosmo -s examples/getters_setters.cosmo
-
-artifacts:
-  - path: bin
-    name: ubuntu20_04-bin-x64
-    type: zip
\ No newline at end of file