Fix

commands/games-sp/captcha.js

@@ -41,7 +41,7 @@ module.exports = class CaptchaCommand extends Command {
 		ctx.strokeText(text, 15, 26);
 		await msg.reply(
 			'**You have 15 seconds, what does the captcha say?**',
-			{ files: [{ attachment: canvas.toBuffer(), name: 'captcha-quiz.png' }] }
+			{ files: [{ attachment: canvas.toBuffer('image/png'), name: 'captcha-quiz.png' }] }
 		);
 		const msgs = await msg.channel.awaitMessages({
 			filter: res => res.author.id === msg.author.id,

commands/games-sp/horse-race.js

@@ -107,6 +107,6 @@ module.exports = class HorseRaceCommand extends Command {
 			ctx.font = this.client.fonts.get('Paladins.otf').toCanvasString(15);
 			ctx.fillText(horse.name, 251, 138 + (49 * i));
 		}
-		return { attachment: canvas.toBuffer(), name: 'leaderboard.png' };
+		return { attachment: canvas.toBuffer('image/png'), name: 'leaderboard.png' };
 	}
 };

commands/games-sp/jeopardy.js

@@ -88,6 +88,6 @@ module.exports = class JeopardyCommand extends Command {
 			ctx.fillStyle = 'white';
 			ctx.fillText(lines[i], canvas.width / 2, height);
 		}
-		return canvas.toBuffer();
+		return canvas.toBuffer('image/png');
 	}
 };

commands/games-sp/pokemon-advantage.js

@@ -147,7 +147,7 @@ module.exports = class PokemonAdvantageCommand extends Command {
 		ctx.fillText(pokemon1.name, 128, 250, 175);
 		ctx.strokeText(pokemon2.name, 348, 250, 175);
 		ctx.fillText(pokemon2.name, 348, 250, 175);
-		return { attachment: canvas.toBuffer(), name };
+		return { attachment: canvas.toBuffer('image/png'), name };
 	}
 
 	calculateAdvantage(pkmn1, pkmn2) {

commands/games-sp/typing-test.js

@@ -80,6 +80,6 @@ module.exports = class TypingTestCommand extends Command {
 		ctx.fillRect(0, 0, canvas.width, canvas.height);
 		ctx.fillStyle = 'black';
 		ctx.fillText(sentence, canvas.width / 2, canvas.height / 2);
-		return canvas.toBuffer();
+		return canvas.toBuffer('image/png');
 	}
 };

commands/games-sp/whos-that-pokemon.js

@@ -149,6 +149,6 @@ module.exports = class WhosThatPokemonCommand extends Command {
 			ctx.fillStyle = '#3c5aa6';
 			ctx.fillText(pokemon.name, 362, 158, 240);
 		}
-		return { attachment: canvas.toBuffer(), name };
+		return { attachment: canvas.toBuffer('image/png'), name };
 	}
 };