diff --git a/tgb/filter.go b/tgb/filter.go
index 1f6e6fa..d4a8391 100644
--- a/tgb/filter.go
+++ b/tgb/filter.go
@@ -21,6 +21,7 @@ type Filter interface {
 // Filter that calls f.
 type FilterFunc func(ctx context.Context, update *Update) (bool, error)
 
+// Allow implements Filter interface.
 func (filter FilterFunc) Allow(ctx context.Context, update *Update) (bool, error) {
 	return filter(ctx, update)
 }
@@ -127,16 +128,28 @@ func Command(command string, opts ...CommandFilterOption) *CommandFilter {
 	return filter
 }
 
+// getUpdateMessage returns first not nil message from update fields.
+func getUpdateMessage(update *Update) *tg.Message {
+	return firstNotNil(
+		update.Message,
+		update.EditedMessage,
+		update.ChannelPost,
+		update.EditedChannelPost,
+	)
+}
+
 // Allow checks if update is allowed by filter.
 func (filter *CommandFilter) Allow(ctx context.Context, update *Update) (bool, error) {
-	if update.Message == nil {
+	msg := getUpdateMessage(update)
+
+	if msg == nil {
 		return false, nil
 	}
 
-	text := update.Message.Text
+	text := msg.Text
 
 	if text == "" && !filter.ignoreCaption {
-		text = update.Message.Caption
+		text = msg.Caption
 	}
 
 	if text == "" {
@@ -184,16 +197,18 @@ func Regexp(re *regexp.Regexp) Filter {
 	return FilterFunc(func(ctx context.Context, update *Update) (bool, error) {
 		var text string
 
+		msg := getUpdateMessage(update)
+
 		switch {
-		case update.Message != nil:
-			text = update.Message.Text
+		case msg != nil:
+			text = msg.Text
 
-			if text == "" && update.Message.Caption != "" {
-				text = update.Message.Caption
+			if text == "" && msg.Caption != "" {
+				text = msg.Caption
 			}
 
-			if text == "" && update.Message.Poll != nil {
-				text = update.Message.Poll.Question
+			if text == "" && msg.Poll != nil {
+				text = msg.Poll.Question
 			}
 		case update.CallbackQuery != nil && update.CallbackQuery.Data != "":
 			text = update.CallbackQuery.Data
@@ -215,15 +230,11 @@ func ChatType(types ...tg.ChatType) Filter {
 	return FilterFunc(func(ctx context.Context, update *Update) (bool, error) {
 		var typ tg.ChatType
 
+		msg := getUpdateMessage(update)
+
 		switch {
-		case update.Message != nil:
-			typ = update.Message.Chat.Type
-		case update.EditedMessage != nil:
-			typ = update.EditedMessage.Chat.Type
-		case update.ChannelPost != nil:
-			typ = update.ChannelPost.Chat.Type
-		case update.EditedChannelPost != nil:
-			typ = update.EditedChannelPost.Chat.Type
+		case msg != nil:
+			typ = msg.Chat.Type
 		case update.CallbackQuery != nil && update.CallbackQuery.Message != nil:
 			typ = update.CallbackQuery.Message.Chat.Type
 		case update.InlineQuery != nil:
diff --git a/tgb/filter_test.go b/tgb/filter_test.go
index bbe4cc3..8b1dae0 100644
--- a/tgb/filter_test.go
+++ b/tgb/filter_test.go
@@ -110,6 +110,16 @@ func TestCommandFilter(t *testing.T) {
 			Update:  &tg.Update{},
 			Allow:   false,
 		},
+		{
+			Name:    "ChannelPost",
+			Command: Command("start"),
+			Update: &tg.Update{
+				ChannelPost: &tg.Message{
+					Text: "/start azcv 5678",
+				},
+			},
+			Allow: true,
+		},
 		{
 			Name: "InCaption",
 			Command: Command("start",