Index: Mk/bsd.default-versions.mk
===================================================================
--- Mk/bsd.default-versions.mk
+++ Mk/bsd.default-versions.mk
@@ -81,7 +81,7 @@
 # Possible values: 7.1, 7.2, 7.3
 PHP_DEFAULT?=		7.2
 # Possible values: 2.7, 3.5, 3.6, 3.7
-PYTHON_DEFAULT?=	2.7
+PYTHON_DEFAULT?=	3.6
 # Possible values: 2.7
 PYTHON2_DEFAULT?=	2.7
 # Possible values: 3.5, 3.6, 3.7
Index: devel/libpeas/Makefile
===================================================================
--- devel/libpeas/Makefile
+++ devel/libpeas/Makefile
@@ -38,7 +38,7 @@
 USES+=		python
 USE_PYTHON=	flavors
 USE_GNOME+=	pygobject3
-.if ${FLAVOR:Upy27:Mpy2*}
+.if ${FLAVOR:Upy36:Mpy2*}
 CONFIGURE_ARGS+=	--disable-python3
 BUILD_WRKSRC=	${WRKSRC}/loaders/python
 INSTALL_WRKSRC=	${WRKSRC}/loaders/python
Index: mail/py-milter/Makefile
===================================================================
--- mail/py-milter/Makefile
+++ mail/py-milter/Makefile
@@ -31,7 +31,7 @@
 
 .include <bsd.port.pre.mk>
 
-.if ${FLAVOR:Upy27:Mpy3*}
+.if ${FLAVOR:Upy36:Mpy3*}
 EXTRA_PATCHES=	${PATCHDIR}/extra-patch-miltermodule.c
 .endif
 
Index: math/py-matplotlib/Makefile
===================================================================
--- math/py-matplotlib/Makefile
+++ math/py-matplotlib/Makefile
@@ -38,7 +38,7 @@
 			QT5AGGBACKEND TKAGGBACKEND WXAGGBACKEND
 OPTIONS_DEFAULT=	GTKBACKEND GTKAGGBACKEND TKAGGBACKEND
 OPTIONS_SUB=		yes
-.if ${FLAVOR:U:Mpy3*}
+.if ${FLAVOR:Upy36:Mpy3*}
 # x11-toolkits/py-gtk2, x11-toolkits/py-wxPython28 do not support Python 3
 OPTIONS_EXCLUDE=	GTKBACKEND GTKAGGBACKEND WXAGGBACKEND
 .endif
Index: security/gpgme/Makefile
===================================================================
--- security/gpgme/Makefile
+++ security/gpgme/Makefile
@@ -87,7 +87,7 @@
 USE_PYTHON=	py3kplist flavors
 CONFIGURE_ENV+=	SWIG=${LOCALBASE}/bin/swig3.0
 PLIST_SUB+=	VERSION=${PORTVERSION}
-.    if ${FLAVOR:Upy27:Mpy2*}
+.    if ${FLAVOR:Upy36:Mpy2*}
 CONFIGURE_ARGS+=--enable-languages="python2"
 .    else
 CONFIGURE_ARGS+=--enable-languages="python3"
Index: textproc/py-enchant/Makefile
===================================================================
--- textproc/py-enchant/Makefile
+++ textproc/py-enchant/Makefile
@@ -20,7 +20,7 @@
 OPTIONS_DEFAULT=WX
 WX_DESC=	Provide a wxSpellCheckerDialog
 OPTIONS_SUB=	yes
-.if ${FLAVOR:U:Mpy3*}
+.if ${FLAVOR:Upy36:Mpy3*}
 OPTIONS_EXCLUDE=	WX
 .endif