diff --git a/doc/src/installation/index.md b/doc/src/installation/index.md
index d97dd3f7b0..85116cf3c7 100644
--- a/doc/src/installation/index.md
+++ b/doc/src/installation/index.md
@@ -49,7 +49,7 @@ installation of `rustup` and then install `nightly` along with `clippy` or
 `miri`, first install `rustup` without a toolchain:
 
 ```console
-curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain none -y
+curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain none -y
 ```
 
 Next you can install `nightly` allowing `rustup` to downgrade until it finds
diff --git a/www/index.html b/www/index.html
index ba073b17c0..048be808bf 100644
--- a/www/index.html
+++ b/www/index.html
@@ -28,7 +28,7 @@
 <div id="platform-instructions-unix" class="instructions display-none">
   <p>Run the following in your terminal, then follow the onscreen instructions.</p>
     <div class="copy-container">
-      <pre class="rustup-command">curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh</pre>
+      <pre class="rustup-command">curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh</pre>
       <button id="copy-button-unix" class="copy-button" title="Copy curl command to clipboard to download Rustup" type="button">
         <div class="copy-icon">
           <svg width="24" height="25" viewBox="0 0 24 25" xmlns="http://www.w3.org/2000/svg" alt="Copy curl command to clipboard to download Rustup">
@@ -49,7 +49,7 @@
   </p>
   <p>If you're a Windows Subsystem for Linux user run the following in your terminal, then follow the onscreen instructions to install Rust.</p>
   <div class="copy-container">
-    <pre class="rustup-command">curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh</pre>
+    <pre class="rustup-command">curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh</pre>
     <button id="copy-button-win32" class="copy-button" title="Copy curl command to clipboard to download Rustup" type="button">
       <div class="copy-icon">
         <svg width="24" height="25" viewBox="0 0 24 25" xmlns="http://www.w3.org/2000/svg" alt="Copy curl command to clipboard to download Rustup">
@@ -70,7 +70,7 @@
   </p>
   <p>If you're a Windows Subsystem for Linux user run the following in your terminal, then follow the onscreen instructions to install Rust.</p>
   <div class="copy-container">
-    <pre class="rustup-command">curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh</pre>
+    <pre class="rustup-command">curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh</pre>
     <button id="copy-button-win64" class="copy-button" title="Copy curl command to clipboard to download Rustup" type="button">
       <div class="copy-icon">
         <svg width="24" height="25" viewBox="0 0 24 25" xmlns="http://www.w3.org/2000/svg" alt="Copy curl command to clipboard to download Rustup">
@@ -104,7 +104,7 @@
   <div>
     <p>If you are running Unix,<br/>run the following in your terminal, then follow the onscreen instructions.</p>
     <div class="copy-container">
-      <pre class="rustup-command">curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh</pre>
+      <pre class="rustup-command">curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh</pre>
       <button id="copy-button-unknown" class="copy-button" title="Copy curl command to clipboard to download Rustup" type="button">
         <div class="copy-icon">
           <svg width="24" height="25" viewBox="0 0 24 25" xmlns="http://www.w3.org/2000/svg" alt="Copy curl command to clipboard to download Rustup">
@@ -143,7 +143,7 @@
     <p>To install Rust, if you are running Unix,<br/>run the following
     in your terminal, then follow the onscreen instructions.</p>
     <div class="copy-container">
-      <pre class="rustup-command">curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh</pre>
+      <pre class="rustup-command">curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh</pre>
       <button id="copy-button-default" class="copy-button" title="Copy curl command to clipboard to download Rustup" type="button">
         <div class="copy-icon">
           <svg width="24" height="25" viewBox="0 0 24 25" xmlns="http://www.w3.org/2000/svg" alt="Copy curl command to clipboard to download Rustup">
diff --git a/www/rustup.js b/www/rustup.js
index 03094cb06b..430b4c3108 100644
--- a/www/rustup.js
+++ b/www/rustup.js
@@ -2,7 +2,7 @@
 
 var platforms = ["default", "unknown", "win32", "win64", "unix"];
 var platform_override = null;
-var rustup_install_command = "curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh";
+var rustup_install_command = "curl --proto '=https' --tlsv1.3 -sSf https://sh.rustup.rs | sh";
 
 function detect_platform() {
     "use strict";