diff --git a/.drone.star b/.drone.star
index ddf029c8..2b528cb8 100644
--- a/.drone.star
+++ b/.drone.star
@@ -45,11 +45,6 @@ def main(ctx):
   linux_cxx("clang++-10 03,11,14,17,20", "clang++-10", packages="clang-10", llvm_os="xenial", llvm_ver="10", buildtype="boost", image="cppalliance/droneubuntu1804:1", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++-10', 'CXXSTD': '03,11,14,17,20', }, globalenv=globalenv),
   osx_cxx("XCode-11.7 03,11,17,2a", "clang++", packages="", buildtype="boost", xcode_version="11.7", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
   osx_cxx("XCode-10.2 03,11,17,2a", "clang++", packages="", buildtype="boost", xcode_version="10.2", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,17,2a', }, globalenv=globalenv),
-  osx_cxx("XCode-9.4 03,11,14,1z", "clang++", packages="", buildtype="boost", xcode_version="9.4", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  osx_cxx("XCode-9.0 03,11,14,1z", "clang++", packages="", buildtype="boost", xcode_version="9", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  osx_cxx("XCode-8.3 03,11,14,1z", "clang++", packages="", buildtype="boost", xcode_version="8.3", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  osx_cxx("XCode-8.0 03,11,14,1z", "clang++", packages="", buildtype="boost", xcode_version="8", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
-  osx_cxx("XCode-7.3 03,11,14,1z", "clang++", packages="", buildtype="boost", xcode_version="7.3", environment={'TOOLSET': 'clang', 'COMPILER': 'clang++', 'CXXSTD': '03,11,14,1z', }, globalenv=globalenv),
   ]
 
 # from https://github.com/boostorg/boost-ci
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a430dc0..a24a40df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,14 @@
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
 name: CI
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - master
+      - develop
+  pull_request:
+  release:
+    types: [published, created, edited]
 jobs:
   ubuntu-jammy:
     runs-on: ubuntu-22.04