diff --git a/make/__main__.py b/make/__main__.py
index 58cba134..b784a534 100755
--- a/make/__main__.py
+++ b/make/__main__.py
@@ -67,7 +67,7 @@ def build_release(is_release=False, docker=False, build_version=None, onedir=Non
         if environ.get('MACOSX_DEPLOYMENT_TARGET') != MACOSX_DEPLOYMENT_TARGET:
             raise click.ClickException((
                 'Refusing to build on MacOS where MACOSX_DEPLOYMENT_TARGET is not '
-                'set to 10.12 (need to setup env?).'
+                f'set to {MACOSX_DEPLOYMENT_TARGET} (need to setup env?).'
             ))
 
     js_bundle_filename = path.join(DIST_DIRNAME, 'emails.js')
diff --git a/make/settings.py b/make/settings.py
index 16ec0a32..baf51c8c 100644
--- a/make/settings.py
+++ b/make/settings.py
@@ -28,7 +28,7 @@
 CODESIGN_KEY_NAME = environ.get('CODESIGN_KEY_NAME')
 NOTARIZE_PASSWORD_KEYCHAIN_NAME = environ.get('NOTARIZE_PASSWORD_KEYCHAIN_NAME')
 
-MACOSX_DEPLOYMENT_TARGET = '10.10'
+MACOSX_DEPLOYMENT_TARGET = '10.9'
 
 
 # Requirements management