diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f9b0f67..3809f52 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,24 +13,19 @@ jobs:
         include:
           - os: windows-latest
             os_short: windows
-            compiler_cc: msvc-vs2019
-          - os: windows-2016
+            compiler_cc: msvc-vs2022
+          - os: windows-2019
             os_short: windows
-            compiler_cc: msvc-vs2017
+            compiler_cc: msvc-vs2019
           - os: ubuntu-latest
             os_short: linux
             compiler_cc: clang
             compiler_cxx: clang++
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             os_short: linux
-            compiler_cc: clang-3.9
-            compiler_cxx: clang++-3.9
-            compiler_install: clang-3.9
-          - os: ubuntu-18.04
-            os_short: linux
-            compiler_cc: gcc-6
-            compiler_cxx: g++-6
-            compiler_install: 'gcc-6 g++6 g++-6-multilib'
+            compiler_cc: clang-6.0
+            compiler_cxx: clang++-6.0
+            compiler_install: clang-6.0
           - os: macos-latest
             os_short: mac
             compiler_cc: clang