diff --git a/pkg/acme/signer.go b/pkg/acme/signer.go
index d21033831..0476aa5e1 100644
--- a/pkg/acme/signer.go
+++ b/pkg/acme/signer.go
@@ -125,7 +125,7 @@ func (s *signer) verify(secretName string, domains []string) (verifyErr error) {
 	duedate := time.Now().Add(s.expiring)
 	tls := s.cache.GetTLSSecretContent(secretName)
 	strdomains := strings.Join(domains, ",")
-	if tls == nil || tls.Crt.NotAfter.Before(duedate) || !match(domains, tls.Crt.DNSNames) {
+	if tls == nil || tls.Crt.NotAfter.Before(duedate) || !match(domains, tls.Crt) {
 		var collector func(domains string, success bool)
 		var reason string
 		if tls == nil {
@@ -165,17 +165,13 @@ func (s *signer) verify(secretName string, domains []string) (verifyErr error) {
 
 // match return true if all hosts in hostnames (desired configuration)
 // are already in dnsnames (current certificate).
-func match(domains, dnsnames []string) bool {
+func match(domains []string, crt *x509.Certificate) bool {
+	found := false
 	for _, domain := range domains {
-		found := false
-		for _, dns := range dnsnames {
-			if domain == dns {
-				found = true
-			}
-		}
+		found = crt.VerifyHostname(domain) == nil
 		if !found {
 			return false
 		}
 	}
 	return true
-}
+}
\ No newline at end of file
diff --git a/pkg/acme/signer_test.go b/pkg/acme/signer_test.go
index 73a3dfebf..a72839123 100644
--- a/pkg/acme/signer_test.go
+++ b/pkg/acme/signer_test.go
@@ -27,17 +27,20 @@ import (
 )
 
 const dumbcrt = `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`
+const dumbwildcardcrt = `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`
 
 func TestNotifyVerify(t *testing.T) {
 	testCases := []struct {
 		input     string
 		expiresIn time.Duration
+		cert string
 		logging   string
 	}{
 		// 0
 		{
 			input:     "s1,d1.local",
 			expiresIn: 10 * 24 * time.Hour,
+			cert: dumbcrt,
 			logging: `
 INFO-V(2) acme: skipping sign, certificate is updated: secret=s1 domain(s)=d1.local`,
 		},
@@ -45,6 +48,7 @@ INFO-V(2) acme: skipping sign, certificate is updated: secret=s1 domain(s)=d1.lo
 		{
 			input:     "s1,d2.local",
 			expiresIn: -10 * 24 * time.Hour,
+			cert: dumbcrt,
 			logging: `
 INFO acme: authorizing: id=1 secret=s1 domain(s)=d2.local endpoint=https://acme-v2.local reason='certificate expires in 2020-12-01 16:33:14 +0000 UTC'
 INFO acme: new certificate issued: id=1 secret=s1 domain(s)=d2.local`,
@@ -53,6 +57,7 @@ INFO acme: new certificate issued: id=1 secret=s1 domain(s)=d2.local`,
 		{
 			input:     "s1,d3.local",
 			expiresIn: 10 * 24 * time.Hour,
+			cert: dumbcrt,
 			logging: `
 INFO acme: authorizing: id=1 secret=s1 domain(s)=d3.local endpoint=https://acme-v2.local reason='added one or more domains to an existing certificate'
 INFO acme: new certificate issued: id=1 secret=s1 domain(s)=d3.local`,
@@ -61,17 +66,33 @@ INFO acme: new certificate issued: id=1 secret=s1 domain(s)=d3.local`,
 		{
 			input:     "s2,d1.local",
 			expiresIn: 10 * 24 * time.Hour,
+			cert: dumbcrt,
 			logging: `
 INFO acme: authorizing: id=1 secret=s2 domain(s)=d1.local endpoint=https://acme-v2.local reason='certificate does not exist'
 INFO acme: new certificate issued: id=1 secret=s2 domain(s)=d1.local`,
 		},
+		{
+			input:     "s1,s3.dev.local",
+			expiresIn: 10 * 24 * time.Hour,
+			cert: dumbwildcardcrt,
+			logging: `
+INFO-V(2) acme: skipping sign, certificate is updated: secret=s1 domain(s)=s3.dev.local`,
+		},
+		{
+			input:     "s1,other.s3.dev.local",
+			expiresIn: 10 * 24 * time.Hour,
+			cert: dumbwildcardcrt,
+			logging: `
+INFO acme: authorizing: id=1 secret=s1 domain(s)=other.s3.dev.local endpoint=https://acme-v2.local reason='added one or more domains to an existing certificate'
+INFO acme: new certificate issued: id=1 secret=s1 domain(s)=other.s3.dev.local`,
+		},
 	}
 	c := setup(t)
 	defer c.teardown()
-	crt, _ := base64.StdEncoding.DecodeString(dumbcrt)
-	x509, _ := x509.ParseCertificate(crt)
-	c.cache.tlsSecret["s1"] = &TLSSecret{Crt: x509}
 	for _, test := range testCases {
+		crt, _ := base64.StdEncoding.DecodeString(test.cert)
+		x509, _ := x509.ParseCertificate(crt)
+		c.cache.tlsSecret["s1"] = &TLSSecret{Crt: x509}
 		signer := c.newSigner()
 		signer.account.Endpoint = "https://acme-v2.local"
 		signer.expiring = x509.NotAfter.Sub(time.Now().Add(test.expiresIn))