diff --git a/.github/workflows/linux-ci.yml b/.github/workflows/linux-ci.yml
index 9c83a2b2..6707b560 100644
--- a/.github/workflows/linux-ci.yml
+++ b/.github/workflows/linux-ci.yml
@@ -1,6 +1,7 @@
 ---
 name: Linux build and test
 on:
+  workflow_dispatch:
   push:
     branches:
       - 'master'
@@ -23,13 +24,13 @@ jobs:
         flags: [ADD_CXXFLAGS=-fvisibility=hidden]
         download_requirements: [sudo apt install -y -qq gfortran liblapack-dev libmetis-dev libnauty-dev]
         include:
-          - os: macos-13
+          - os: macos-15-intel
             build_static: false
-            flags: CC=clang OSX=13
+            flags: CC=clang CXX=clang++ OSX=15
             download_requirements: brew install metis bash
-          - os: macos-13
+          - os: macos-15-intel
             build_static: false
-            flags: CC=gcc-13 CXX=g++-13 OSX=13 ADD_CXXFLAGS=-Wl,-ld_classic
+            flags: CC=gcc-15 CXX=g++-15 OSX=15 ADD_CXXFLAGS=-Wl,-ld_classic
             download_requirements: brew install metis bash
           - os: macos-14
             arch: arm64
diff --git a/.github/workflows/windows-ci.yml b/.github/workflows/windows-ci.yml
index 07a5ca76..6e875b81 100644
--- a/.github/workflows/windows-ci.yml
+++ b/.github/workflows/windows-ci.yml
@@ -1,6 +1,7 @@
 ---
 name: Windows build and test
 on:
+  workflow_dispatch:
   push:
     branches:
       - 'master'
diff --git a/.github/workflows/windows-msvs-ci.yml b/.github/workflows/windows-msvs-ci.yml
index 0512ded7..5bb9b77e 100644
--- a/.github/workflows/windows-msvs-ci.yml
+++ b/.github/workflows/windows-msvs-ci.yml
@@ -1,6 +1,7 @@
 ---
 name: Windows MSVS build and test
 on:
+  workflow_dispatch:
   push:
     branches:
       - 'master'