diff --git a/mathbot/rendering.py b/mathbot/rendering.py
index eab229f..a001d78 100644
--- a/mathbot/rendering.py
+++ b/mathbot/rendering.py
@@ -34,6 +34,7 @@ def get_png(tex):
 
 	buf.seek(0)
 
+	plt.clf()
 
 	return buf