diff --git a/pkg/mutes/mutes.go b/pkg/mutes/mutes.go
index 956eba7..6c6d946 100644
--- a/pkg/mutes/mutes.go
+++ b/pkg/mutes/mutes.go
@@ -35,6 +35,10 @@ func (m *Mute) Matches(chain string, proposalID string) bool {
 	return match
 }
 
+func (m *Mute) LabelsEqual(another *Mute) bool {
+	return m.Chain == another.Chain && m.ProposalID == another.ProposalID
+}
+
 func (m *Mutes) IsMuted(chain string, proposalID string) bool {
 	for _, mute := range m.Mutes {
 		if mute.IsExpired() {
@@ -50,6 +54,18 @@ func (m *Mutes) IsMuted(chain string, proposalID string) bool {
 }
 
 func (m *Mutes) AddMute(mute *Mute) {
+	for _, existingMute := range m.Mutes {
+		if existingMute.LabelsEqual(mute) {
+			existingMute.Comment = mute.Comment
+			existingMute.Expires = mute.Expires
+
+			m.Mutes = utils.Filter(m.Mutes, func(m *Mute) bool {
+				return !m.IsExpired()
+			})
+			return
+		}
+	}
+
 	m.Mutes = append(m.Mutes, mute)
 	m.Mutes = utils.Filter(m.Mutes, func(m *Mute) bool {
 		return !m.IsExpired()
diff --git a/pkg/mutes/mutes_test.go b/pkg/mutes/mutes_test.go
index bc84c61..add7cfe 100644
--- a/pkg/mutes/mutes_test.go
+++ b/pkg/mutes/mutes_test.go
@@ -71,7 +71,7 @@ func TestMutesMatchesNotIgnoreActual(t *testing.T) {
 	assert.True(t, muted, "Mute should be muted!")
 }
 
-func TestMutesAddsMute(t *testing.T) {
+func TestMutesAddsMuteNew(t *testing.T) {
 	t.Parallel()
 
 	mutes := Mutes{
@@ -84,3 +84,30 @@ func TestMutesAddsMute(t *testing.T) {
 	assert.Len(t, mutes.Mutes, 1, "There should be 1 mute!")
 	assert.Equal(t, "chain2", mutes.Mutes[0].Chain, "Chain name should match!")
 }
+
+func TestMutesAddsMuteOverride(t *testing.T) {
+	t.Parallel()
+
+	expireTime := time.Now().Add(time.Hour)
+
+	mutes := Mutes{
+		Mutes: []*Mute{
+			{Chain: "chain1", ProposalID: "proposal1", Expires: expireTime, Comment: "comment1"},
+			{Chain: "chain1", ProposalID: "proposal2", Expires: expireTime, Comment: "comment2"},
+		},
+	}
+
+	newExpireTime := time.Now().Add(3 * time.Hour)
+
+	mutes.AddMute(&Mute{
+		Chain:      "chain1",
+		ProposalID: "proposal1",
+		Expires:    newExpireTime,
+		Comment:    "newcomment",
+	})
+	assert.Len(t, mutes.Mutes, 2)
+	assert.Equal(t, "chain1", mutes.Mutes[0].Chain)
+	assert.Equal(t, "proposal1", mutes.Mutes[0].ProposalID)
+	assert.Equal(t, "newcomment", mutes.Mutes[0].Comment)
+	assert.Equal(t, newExpireTime, mutes.Mutes[0].Expires)
+}