diff --git a/Changelog.md b/Changelog.md
index fcaa4a54..808cc7ed 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -22,6 +22,7 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 * GODT-698 Use correct package type for signed PGP/Inline messages.
 * Generic bug report window title.
 * Fix missing check for unencrypted recipients during sending.
+* Version checking for catalina.
 
 
 ## [IE 1.0.x] Congo (v1.0.0 live 2020-09-08)
diff --git a/go.mod b/go.mod
index 742e94e8..21e113b8 100644
--- a/go.mod
+++ b/go.mod
@@ -13,6 +13,7 @@ require (
 
 require (
 	github.com/0xAX/notificator v0.0.0-20191016112426-3962a5ea8da1
+	github.com/Masterminds/semver/v3 v3.1.0
 	github.com/ProtonMail/go-appdir v1.1.0
 	github.com/ProtonMail/go-apple-mobileconfig v0.0.0-20160701194735-7ea9927a11f6
 	github.com/ProtonMail/go-autostart v0.0.0-20181114175602-c5272053443a
diff --git a/go.sum b/go.sum
index bd7b3d25..8d659fce 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,9 @@
 github.com/0xAX/notificator v0.0.0-20191016112426-3962a5ea8da1 h1:j9HaafapDbPbGRDku6e/HRs6KBMcKHiWcm1/9Sbxnl4=
 github.com/0xAX/notificator v0.0.0-20191016112426-3962a5ea8da1/go.mod h1:NtXa9WwQsukMHZpjNakTTz0LArxvGYdPA9CjIcUSZ6s=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
+github.com/Masterminds/semver/v3 v3.1.0 h1:Y2lUDsFKVRSYGojLJ1yLxSXdMmMYTYls0rCvoqmMUQk=
+github.com/Masterminds/semver/v3 v3.1.0/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/ProtonMail/bcrypt v0.0.0-20170924085257-7509ea014998 h1:YT2uVwQiRQZxCaaahwfcgTq2j3j66w00n/27gb/zubs=
 github.com/ProtonMail/bcrypt v0.0.0-20170924085257-7509ea014998/go.mod h1:HecWFHognK8GfRDGnFQbW/LiV7A3MX3gZVs45vk5h8I=
 github.com/ProtonMail/crypto v0.0.0-20200416114516-1fa7f403fb9c h1:DAvlgde2Stu18slmjwikiMPs/CKPV35wSvmJS34z0FU=
diff --git a/pkg/useragent/useragent.go b/pkg/useragent/useragent.go
index 95dc8490..5052e953 100644
--- a/pkg/useragent/useragent.go
+++ b/pkg/useragent/useragent.go
@@ -18,40 +18,35 @@
 package useragent
 
 import (
-	"fmt"
 	"os/exec"
 	"runtime"
+
+	"github.com/Masterminds/semver/v3"
 )
 
-// IsCatalinaOrNewer checks that host is MacOS Catalina 10.14.xx or higher.
+// IsCatalinaOrNewer checks that host is MacOS Catalina 10.15.x or higher.
 func IsCatalinaOrNewer() bool {
 	if runtime.GOOS != "darwin" {
 		return false
 	}
-	major, minor, _ := getMacVersion()
-	return isVersionCatalinaOrNewer(major, minor)
+	return isVersionCatalinaOrNewer(getMacVersion())
 }
 
-func getMacVersion() (major, minor, tiny int) {
-	major, minor, tiny = 10, 0, 0
+func getMacVersion() string {
 	out, err := exec.Command("sw_vers", "-productVersion").Output()
 	if err != nil {
-		return
+		return ""
 	}
-	return parseMacVersion(string(out))
+
+	return string(out)
 }
 
-func parseMacVersion(version string) (major, minor, tiny int) {
-	_, _ = fmt.Sscanf(version, "%d.%d.%d", &major, &minor, &tiny)
-	return
-}
+func isVersionCatalinaOrNewer(version string) bool {
+	v, err := semver.StrictNewVersion(version)
+	if err != nil {
+		return false
+	}
 
-func isVersionCatalinaOrNewer(major, minor int) bool {
-	if major != 10 {
-		return false
-	}
-	if minor < 15 {
-		return false
-	}
-	return true
+	catalina := semver.MustParse("10.15.0")
+	return v.GreaterThan(catalina) || v.Equal(catalina)
 }
diff --git a/pkg/useragent/useragent_test.go b/pkg/useragent/useragent_test.go
index 17ef1965..e98fe86d 100644
--- a/pkg/useragent/useragent_test.go
+++ b/pkg/useragent/useragent_test.go
@@ -23,35 +23,21 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestGetMacVersion(t *testing.T) {
-	testData := map[string]struct{ major, minor, tiny int }{
-		"10.14.4":     {10, 14, 4},
-		"10.14.4\r\n": {10, 14, 4},
-		"10.14.0":     {10, 14, 0},
-		"10.14":       {10, 14, 0},
-		"10":          {10, 0, 0},
-	}
-
-	for arg, exp := range testData {
-		gotMajor, gotMinor, gotTiny := parseMacVersion(arg)
-		assert.Equal(t, exp.major, gotMajor, "arg %q", arg)
-		assert.Equal(t, exp.minor, gotMinor, "arg %q", arg)
-		assert.Equal(t, exp.tiny, gotTiny, "arg %q", arg)
-	}
-}
-
 func TestIsVersionCatalinaOrNewer(t *testing.T) {
-	testData := map[struct{ major, minor int }]bool{
-		{9, 0}:   false,
-		{9, 15}:  false,
-		{10, 13}: false,
-		{10, 14}: false,
-		{10, 15}: true,
-		{10, 16}: true,
+	testData := map[struct{ version string }]bool{
+		{""}:         false,
+		{"9.0.0"}:    false,
+		{"9.15.0"}:   false,
+		{"10.13.0"}:  false,
+		{"10.14.0"}:  false,
+		{"10.14.99"}: false,
+		{"10.15.0"}:  true,
+		{"10.16.0"}:  true,
+		{"11.0.0"}:   true,
 	}
 
 	for args, exp := range testData {
-		got := isVersionCatalinaOrNewer(args.major, args.minor)
-		assert.Equal(t, exp, got, "version %q.%q", args.major, args.minor)
+		got := isVersionCatalinaOrNewer(args.version)
+		assert.Equal(t, exp, got, "version %v", args.version)
 	}
 }