diff --git a/changelog.js b/changelog.js
index 34ec2115..68b80e39 100644
--- a/changelog.js
+++ b/changelog.js
@@ -1,6 +1,6 @@
 const CHANGELOG = {
   "August 2020": [
-    "Completely redid everything about the site except for chapter text: the Primer is now finally a normal web page again."
+    "Completely redid all the code for the site, except for chapter text: the Primer is now finally a normal web page again."
   ],
 
   "June 2020": [
@@ -49,7 +49,8 @@ const CHANGELOG = {
   ],
 
   "January 2016": [
-    "Added a section to explain the Bezier interval."
+    "Added a section to explain the Bezier interval.",
+    "Rewrote the Primer as a React application."
   ],
 
   "December 2015": [
diff --git a/index.html b/index.html
index c6cd3c17..4e25e39d 100644
--- a/index.html
+++ b/index.html
@@ -270,7 +270,7 @@
           <h2>August 2020</h2>
           <ul>
             <li>
-              Completely redid everything about the site except for chapter
+              Completely redid all the code for the site, except for chapter
               text: the Primer is now finally a normal web page again.
             </li>
           </ul>
@@ -342,6 +342,7 @@
           <h2>January 2016</h2>
           <ul>
             <li>Added a section to explain the Bezier interval.</li>
+            <li>Rewrote the Primer as a React application.</li>
           </ul>
           <h2>December 2015</h2>
           <ul>
diff --git a/ja-JP/index.html b/ja-JP/index.html
index 065bdcce..68b5a853 100644
--- a/ja-JP/index.html
+++ b/ja-JP/index.html
@@ -192,7 +192,7 @@
           <h2>August 2020</h2>
           <ul>
             <li>
-              Completely redid everything about the site except for chapter
+              Completely redid all the code for the site, except for chapter
               text: the Primer is now finally a normal web page again.
             </li>
           </ul>
@@ -264,6 +264,7 @@
           <h2>January 2016</h2>
           <ul>
             <li>Added a section to explain the Bezier interval.</li>
+            <li>Rewrote the Primer as a React application.</li>
           </ul>
           <h2>December 2015</h2>
           <ul>
diff --git a/zh-CN/index.html b/zh-CN/index.html
index da49381f..4c5b698a 100644
--- a/zh-CN/index.html
+++ b/zh-CN/index.html
@@ -180,7 +180,7 @@
           <h2>August 2020</h2>
           <ul>
             <li>
-              Completely redid everything about the site except for chapter
+              Completely redid all the code for the site, except for chapter
               text: the Primer is now finally a normal web page again.
             </li>
           </ul>
@@ -252,6 +252,7 @@
           <h2>January 2016</h2>
           <ul>
             <li>Added a section to explain the Bezier interval.</li>
+            <li>Rewrote the Primer as a React application.</li>
           </ul>
           <h2>December 2015</h2>
           <ul>