diff --git a/genealogy/gramps/Portfile b/genealogy/gramps/Portfile
index 90223f31ba15d..08d0e37b9d813 100644
--- a/genealogy/gramps/Portfile
+++ b/genealogy/gramps/Portfile
@@ -48,7 +48,7 @@ patchfiles              patch-gramps-gen-utils-resourcepath.py.diff
 
 # versions 4.2.0+ only support python 3
 
-variant python35 conflicts python36 description {Use Python 3.5} {
+variant python35 conflicts python36 python37 description {Use Python 3.5} {
     python.default_version  35
     depends_lib-append  port:py35-gobject3 \
                         port:py35-pyicu \
@@ -56,7 +56,7 @@ variant python35 conflicts python36 description {Use Python 3.5} {
                         port:py35-bsddb3
 }
 
-variant python36 conflicts python35 description {Use Python 3.6} {
+variant python36 conflicts python35 python37 description {Use Python 3.6} {
     python.default_version  36
     depends_lib-append  port:py36-gobject3 \
                         port:py36-pyicu \
@@ -64,7 +64,15 @@ variant python36 conflicts python35 description {Use Python 3.6} {
                         port:py36-bsddb3
 }
 
-if {![variant_isset python35]} {
+variant python37 conflicts python35 python36 description {Use Python 3.7} {
+    python.default_version  37
+    depends_lib-append  port:py37-gobject3 \
+                        port:py37-pyicu \
+                        port:py37-Pillow \
+                        port:py37-bsddb3
+}
+
+if {![variant_isset python35] && ![variant_isset python37]} {
     default_variants    +python36
 }