diff --git a/.github/workflows/posix.yml b/.github/workflows/posix.yml
index 030c1699..6c1de1fd 100644
--- a/.github/workflows/posix.yml
+++ b/.github/workflows/posix.yml
@@ -16,7 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-22.04
           - ubuntu-24.04
           - macos-13
           - macos-15
@@ -39,10 +39,10 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-22.04
           - ubuntu-24.04
           - macos-13
-          - macos-15
+          # - macos-15
     steps:
       - name: Set up `tmpfs` (if supported)
         run: sudo mount tmpfs -t tmpfs -o size=100m /tmp
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 7d2b091e..f750ca0b 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         os:
           - windows-2019
-          - windows-2022
+          - windows-2025
         BUILD_SHARED_LIBS:
           - "TRUE"
           - "FALSE"
@@ -37,7 +37,7 @@ jobs:
       matrix:
         os:
           - windows-2019
-          - windows-2022
+          - windows-2025
     steps:
       - name: Install Meson
         run: pip install meson ninja
diff --git a/meson.build b/meson.build
index b7764fa1..325e2114 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
   'tmp',
   'cpp',
-  version: '2.0',
+  version: '3.0',
   default_options: ['cpp_std=c++17'],
 )