diff --git a/sys-cluster/heat/heat-10.0.1.ebuild b/sys-cluster/heat/heat-10.0.1.ebuild
index 5bc1648a12940..65275062e53fa 100644
--- a/sys-cluster/heat/heat-10.0.1.ebuild
+++ b/sys-cluster/heat/heat-10.0.1.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
-PYTHON_COMPAT=( python2_7 python3_{4,5} )
+PYTHON_COMPAT=( python2_7 python3_{4,5,6} )
 
 inherit distutils-r1 eutils linux-info user
 
diff --git a/sys-cluster/heat/heat-2017.2.9999.ebuild b/sys-cluster/heat/heat-2017.2.9999.ebuild
index 472f8a0a47db4..05527326a70b2 100644
--- a/sys-cluster/heat/heat-2017.2.9999.ebuild
+++ b/sys-cluster/heat/heat-2017.2.9999.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
-PYTHON_COMPAT=( python2_7 python3_{4,5} )
+PYTHON_COMPAT=( python2_7 python3_{4,5,6} )
 
 inherit distutils-r1 eutils linux-info user
 
diff --git a/sys-cluster/heat/heat-2018.1.9999.ebuild b/sys-cluster/heat/heat-2018.1.9999.ebuild
index fd03db676225c..89045903e72ff 100644
--- a/sys-cluster/heat/heat-2018.1.9999.ebuild
+++ b/sys-cluster/heat/heat-2018.1.9999.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
-PYTHON_COMPAT=( python2_7 python3_{4,5} )
+PYTHON_COMPAT=( python2_7 python3_{4,5,6} )
 
 inherit distutils-r1 eutils linux-info user