diff --git a/docs/index.html b/docs/index.html
index 4c976f97..3715f79c 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -38,7 +38,7 @@
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2021-03-26T00:11:54+00:00" />
+		<meta property="og:updated_time" content="2021-03-26T00:19:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -156,7 +156,7 @@
 			<h2>Donations and sponsorship</h2>
 
 			<a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png" />
+				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG" />
 			</a>
 
 			<p>
diff --git a/docs/ja-JP/index.html b/docs/ja-JP/index.html
index fe18a438..f0f5dfda 100644
--- a/docs/ja-JP/index.html
+++ b/docs/ja-JP/index.html
@@ -41,7 +41,7 @@
 		<meta property="og:locale" content="ja-JP" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2021-03-26T00:11:54+00:00" />
+		<meta property="og:updated_time" content="2021-03-26T00:19:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -159,7 +159,7 @@
 			<h2>Donations and sponsorship</h2>
 
 			<a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png" />
+				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG" />
 			</a>
 
 			<p>
diff --git a/docs/news/2020-09-18.html b/docs/news/2020-09-18.html
index b82861aa..0312ce2b 100644
--- a/docs/news/2020-09-18.html
+++ b/docs/news/2020-09-18.html
@@ -34,7 +34,7 @@
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="Thu Sep 17 2020 17:00:00 +00:00" />
-		<meta property="og:updated_time" content="Thu Mar 25 2021 17:11:54 +00:00" />
+		<meta property="og:updated_time" content="Thu Mar 25 2021 17:19:34 +00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
diff --git a/docs/news/2020-11-22.html b/docs/news/2020-11-22.html
index 29d9cb16..8ad7b459 100644
--- a/docs/news/2020-11-22.html
+++ b/docs/news/2020-11-22.html
@@ -34,7 +34,7 @@
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="Sat Nov 21 2020 16:00:00 +00:00" />
-		<meta property="og:updated_time" content="Thu Mar 25 2021 17:11:54 +00:00" />
+		<meta property="og:updated_time" content="Thu Mar 25 2021 17:19:34 +00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
diff --git a/docs/news/index.html b/docs/news/index.html
index 32aaa09d..e1cc964c 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -33,7 +33,7 @@
 		<meta property="og:description" content="" />
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
-		<meta property="og:published_time" content="Thu Mar 25 2021 17:11:54 GMT-0700 (Pacific Daylight Time)" />
+		<meta property="og:published_time" content="Thu Mar 25 2021 17:19:34 GMT-0700 (Pacific Daylight Time)" />
 		<meta property="og:updated_time" content="" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
diff --git a/docs/news/rss.xml b/docs/news/rss.xml
index 48648ae8..c9e7a7b5 100644
--- a/docs/news/rss.xml
+++ b/docs/news/rss.xml
@@ -6,7 +6,7 @@
   <atom:link href="https://pomax.github.io/bezierinfo" rel="self"></atom:link>
   <description>News updates for the <a href="https://pomax.github.io/bezierinfo">primer on Bézier Curves</a> by Pomax</description>
   <language>en-GB</language>
-  <lastBuildDate>Thu Mar 25 2021 17:11:54 +00:00</lastBuildDate>
+  <lastBuildDate>Thu Mar 25 2021 17:19:34 +00:00</lastBuildDate>
   <image>
     <url>https://pomax.github.io/bezierinfo/images/og-image.png</url>
     <title>A Primer on Bézier Curves</title>
diff --git a/docs/ru-RU/index.html b/docs/ru-RU/index.html
index 4d7d051b..bf23232a 100644
--- a/docs/ru-RU/index.html
+++ b/docs/ru-RU/index.html
@@ -34,7 +34,7 @@
 		<meta property="og:locale" content="ru-RU" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2021-03-26T00:11:54+00:00" />
+		<meta property="og:updated_time" content="2021-03-26T00:19:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -149,7 +149,7 @@
 			<h2>Donations and sponsorship</h2>
 
 			<a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png" />
+				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG" />
 			</a>
 
 			<p>
diff --git a/docs/uk-UA/index.html b/docs/uk-UA/index.html
index a7c66f63..fc1d25ec 100644
--- a/docs/uk-UA/index.html
+++ b/docs/uk-UA/index.html
@@ -39,7 +39,7 @@
 		<meta property="og:locale" content="uk-UA" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2021-03-26T00:11:54+00:00" />
+		<meta property="og:updated_time" content="2021-03-26T00:19:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -154,7 +154,7 @@
 			<h2>Donations and sponsorship</h2>
 
 			<a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png" />
+				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG" />
 			</a>
 
 			<p>
diff --git a/docs/zh-CN/index.html b/docs/zh-CN/index.html
index 0e878320..baa01aaf 100644
--- a/docs/zh-CN/index.html
+++ b/docs/zh-CN/index.html
@@ -41,7 +41,7 @@
 		<meta property="og:locale" content="zh-CN" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2021-03-26T00:11:54+00:00" />
+		<meta property="og:updated_time" content="2021-03-26T00:19:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -159,7 +159,7 @@
 			<h2>Donations and sponsorship</h2>
 
 			<a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png" />
+				<img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG" />
 			</a>
 
 			<p>
diff --git a/src/html/fragments/donations.html b/src/html/fragments/donations.html
index 240decea..dddec9cf 100644
--- a/src/html/fragments/donations.html
+++ b/src/html/fragments/donations.html
@@ -1,7 +1,7 @@
 <h2>{{ donationsHeading }} </h2>
 
 <a class="btcqr" href="bitcoin:3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu?label=Primer%20on%20Bezier%20Curves">
-    <img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.png">
+    <img src="./images/3GY1HbQ2cH9V4xBLnRYdEfc42Nd1ZyjLZu.PNG">
 </a>
 
 {{ donationCTA }}