diff --git a/files/templates/default.html b/files/templates/default.html
index ba82d934b1..706fb34cb5 100644
--- a/files/templates/default.html
+++ b/files/templates/default.html
@@ -47,7 +47,7 @@
 	</script>
 	<script type="text/javascript">
 		new BugController({
-			imageSprite: "/assets/images/fly-sprite.gif",
+			imageSprite: "/assets/images/fly-sprite.png",
 			canDie: false,
 			minBugs: 5,
 			maxBugs: 30,
@@ -1166,4 +1166,4 @@
 
 </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/files/templates/submission.html b/files/templates/submission.html
index 5152dc2137..191cd92062 100644
--- a/files/templates/submission.html
+++ b/files/templates/submission.html
@@ -181,7 +181,7 @@
 {% set maxbugs = 20*p.award_count("shit") if p.award_count("shit") <= 5 else 100 %}
 <script type="text/javascript">
 	new BugController({
-		imageSprite: "/assets/images/fly-sprite.gif",
+		imageSprite: "/assets/images/fly-sprite.png",
 		canDie: false,
 		minBugs: {{minbugs}},
 		maxBugs: {{maxbugs}},