replace this in the end of podfile: post_install do |installer| installer.pods_project.targets.each do |target| flutter_additional_ios_build_settings(target) end end with this: post_install do |installer| installer.pods_project.targets.each do |target| if target.name == 'BoringSSL-GRPC' target.source_build_phase.files.each do |file| if file.settings && file.settings['COMPILER_FLAGS'] flags = file.settings['COMPILER_FLAGS'].split flags.reject! { |flag| flag == '-GCC_WARN_INHIBIT_ALL_WARNINGS' } file.settings['COMPILER_FLAGS'] = flags.join(' ') end end end flutter_additional_ios_build_settings(target) target.build_configurations.each do |config| config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0' end end end