diff --git a/anthropic_files.go b/anthropic_files.go
index 2a343e8..7ca2ae0 100644
--- a/anthropic_files.go
+++ b/anthropic_files.go
@@ -105,9 +105,9 @@ func parseMissingFileIDFromBody(raw string) string {
 	// quotes, so the id ends at the first character outside the alphanumeric +
 	// underscore set.
 	end := strings.IndexFunc(rest, func(r rune) bool {
-		return !(r >= 'a' && r <= 'z') &&
-			!(r >= 'A' && r <= 'Z') &&
-			!(r >= '0' && r <= '9') &&
+		return (r < 'a' || r > 'z') &&
+			(r < 'A' || r > 'Z') &&
+			(r < '0' || r > '9') &&
 			r != '_'
 	})
 	if end == -1 {
diff --git a/elevenlabs.go b/elevenlabs.go
index 7433d23..a4e06b3 100644
--- a/elevenlabs.go
+++ b/elevenlabs.go
@@ -42,7 +42,7 @@ func (b *Bot) generateSpeech(ctx context.Context, text string) (io.Reader, error
 		return nil, fmt.Errorf("elevenlabs TTS error: %w", err)
 	}
 	if resp.StatusCode != http.StatusOK {
-		defer resp.Body.Close()
+		defer func() { _ = resp.Body.Close() }()
 		errBody, _ := io.ReadAll(resp.Body)
 		return nil, fmt.Errorf("elevenlabs TTS error: status %d: %s", resp.StatusCode, errBody)
 	}
@@ -90,7 +90,7 @@ func (b *Bot) transcribeVoice(ctx context.Context, fileID string) (string, error
 	if err != nil {
 		return "", fmt.Errorf("elevenlabs STT request error: %w", err)
 	}
-	defer sttResp.Body.Close()
+	defer func() { _ = sttResp.Body.Close() }()
 
 	if sttResp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(sttResp.Body)
diff --git a/go-telegram-bot.exe b/go-telegram-bot.exe
index 0f5ad56..c2249d4 100644
Binary files a/go-telegram-bot.exe and b/go-telegram-bot.exe differ
diff --git a/telegram_helpers.go b/telegram_helpers.go
index 3da8b4f..4a02a31 100644
--- a/telegram_helpers.go
+++ b/telegram_helpers.go
@@ -50,7 +50,7 @@ func (b *Bot) downloadTelegramFile(ctx context.Context, fileID string) ([]byte,
 	if err != nil {
 		return nil, fmt.Errorf("telegram download %s: %w", fileID, err)
 	}
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 	if resp.StatusCode != http.StatusOK {
 		return nil, fmt.Errorf("telegram download %s: status %d", fileID, resp.StatusCode)
 	}