diff --git a/go.mod b/go.mod
index 972284a..8a5b13e 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module git.openprivacy.ca/flutter/libcwtch-go
 go 1.15
 
 require (
-	cwtch.im/cwtch v0.7.6
+	cwtch.im/cwtch v0.8.0
 	git.openprivacy.ca/openprivacy/connectivity v1.4.3
 	git.openprivacy.ca/openprivacy/log v1.0.2
 	golang.org/x/mobile v0.0.0-20210220033013-bdb1ca9a1e08 // indirect
diff --git a/go.sum b/go.sum
index 92ab857..415261e 100644
--- a/go.sum
+++ b/go.sum
@@ -32,6 +32,8 @@ cwtch.im/cwtch v0.7.5 h1:Ab0XUGWUVUP0WWXT6AsPwWrUaOuM1RmNiw+6AGYsfdk=
 cwtch.im/cwtch v0.7.5/go.mod h1:S0JRLSTwFM+kRrpOPKgUQn/loKe/fc6lLDnOFopRKq8=
 cwtch.im/cwtch v0.7.6 h1:dEj9vtk9gv7Fwc7ru6ir/mZLSEnqBU1Pr0on/xyUdKE=
 cwtch.im/cwtch v0.7.6/go.mod h1:S0JRLSTwFM+kRrpOPKgUQn/loKe/fc6lLDnOFopRKq8=
+cwtch.im/cwtch v0.8.0 h1:QDRaDBTXefFRPZPqUMtxoNhOcgXv0rl0bGjysSOmJX0=
+cwtch.im/cwtch v0.8.0/go.mod h1:+SY/4ueF1U7mK+CX8hZFbtd+GC1lx/cReo110KgtQAw=
 cwtch.im/tapir v0.2.1 h1:t1YJB9q5sV1A9xwiiwL6WVfw3dwQWLoecunuzT1PQtw=
 cwtch.im/tapir v0.2.1/go.mod h1:xzzZ28adyUXNkYL1YodcHsAiTt3IJ8Loc29YVn9mIEQ=
 git.openprivacy.ca/cwtch.im/tapir v0.3.2 h1:thLWqqY1LkirWFcy9Tg6NgWeYbvo9xBm+s2XVnCIvpY=
@@ -44,6 +46,8 @@ git.openprivacy.ca/cwtch.im/tapir v0.3.5 h1:AlqAhluY4ivznGoHh37Khyxy0u9IbtYskP93
 git.openprivacy.ca/cwtch.im/tapir v0.3.5/go.mod h1:eH6dZxXrhW0C4KZX18ksUa6XJCrEvtg8cJJ/Fy6gv+E=
 git.openprivacy.ca/cwtch.im/tapir v0.4.0 h1:clG8uORt0NKEhT4P+Dpw1pzyUuYzYBMevGqn2pciKk8=
 git.openprivacy.ca/cwtch.im/tapir v0.4.0/go.mod h1:eH6dZxXrhW0C4KZX18ksUa6XJCrEvtg8cJJ/Fy6gv+E=
+git.openprivacy.ca/cwtch.im/tapir v0.4.1 h1:9LMpQX41IzecNNlRc1FZKXHg6wlFss679tFsa3vzb3Y=
+git.openprivacy.ca/cwtch.im/tapir v0.4.1/go.mod h1:eH6dZxXrhW0C4KZX18ksUa6XJCrEvtg8cJJ/Fy6gv+E=
 git.openprivacy.ca/openprivacy/bine v0.0.4 h1:CO7EkGyz+jegZ4ap8g5NWRuDHA/56KKvGySR6OBPW+c=
 git.openprivacy.ca/openprivacy/bine v0.0.4/go.mod h1:13ZqhKyqakDsN/ZkQkIGNULsmLyqtXc46XBcnuXm/mU=
 git.openprivacy.ca/openprivacy/connectivity v1.2.0/go.mod h1:B7vzuVmChJtSKoh0ezph5vu6DQ0gIk0zHUNG6IgXCcA=
diff --git a/utils/eventHandler.go b/utils/eventHandler.go
index 0593a2a..0013578 100644
--- a/utils/eventHandler.go
+++ b/utils/eventHandler.go
@@ -162,6 +162,13 @@ func (eh *EventHandler) handleAppBusEvent(e *event.Event) string {
 		// We compile and send the groups regardless of the experiment flag, and hide them in the UI
 		for _, groupId := range profile.GetGroups() {
 			group := profile.GetGroup(groupId)
+
+			// Check that the group is cryptographically valid
+			if group.CheckGroup() == false {
+				// TODO uncomment once group upgrade is complete...
+				//continue
+			}
+
 			ph := NewPeerHelper(profile)
 			cpicPath := ph.GetProfilePic(groupId)