diff --git a/.github/workflows/cli.yml b/.github/workflows/cli.yml
index 5b20afa..5fc9ccb 100644
--- a/.github/workflows/cli.yml
+++ b/.github/workflows/cli.yml
@@ -12,16 +12,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest]
         include:
           - os: ubuntu-latest
             ARCH: linux-x86_64
             MIME: application/octet-stream
             EXT: ''
-          - os: windows-latest
-            ARCH: windows-x86_64
-            MIME: application/vnd.microsoft.portable-executable
-            EXT: '.exe'
           - os: macos-latest
             ARCH: macos-x86_64
             MIME: application/octet-stream
diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index d2ee8c7..17610b8 100644
--- a/.github/workflows/java.yml
+++ b/.github/workflows/java.yml
@@ -12,14 +12,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest]
         include:
           - os: ubuntu-latest
             ARCH: linux-x86_64
             FILE: 'libhyperbuild_java.so'
-          - os: windows-latest
-            ARCH: windows-x86_64
-            FILE: 'hyperbuild_java.dll'
           - os: macos-latest
             ARCH: macos-x86_64
             FILE: 'libhyperbuild_java.dylib'
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index f98b16f..4d4219e 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -12,14 +12,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        # Use windows-2016 as windows-2019 has LNK1181 error when building Neon module.
-        os: [ubuntu-latest, windows-2016, macos-latest]
+        os: [ubuntu-latest, macos-latest]
         node: [8, 9, 10, 11, 12, 13, 14]
         include:
           - os: ubuntu-latest
             ARCH: linux-x86_64
-          - os: windows-2016
-            ARCH: windows-x86_64
           - os: macos-latest
             ARCH: macos-x86_64
     steps:
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 5b064d2..e6f0c6c 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -12,17 +12,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest]
         python: [3.5, 3.6, 3.7, 3.8]
         include:
           - os: ubuntu-latest
             ARCH: linux-x86_64
             LIBFILE: 'libhyperbuild_python_lib.so'
             PYEXT: 'so'
-          - os: windows-latest
-            ARCH: windows-x86_64
-            LIBFILE: 'hyperbuild_python_lib.dll'
-            PYEXT: 'pyd'
           - os: macos-latest
             ARCH: macos-x86_64
             LIBFILE: 'libhyperbuild_python_lib.dylib'