diff --git a/www/index.html b/www/index.html
index 8b92fe9..616105a 100644
--- a/www/index.html
+++ b/www/index.html
@@ -26,19 +26,19 @@
 
       <div id="platform-instructions-linux" class="instructions" style="display: none;">
         <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		<pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		<pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
         <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.<br/>You appear to be running Linux. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
       </div>
 
       <div id="platform-instructions-mac" class="instructions" style="display: none;">
         <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		<pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		<pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
         <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.<br/>You appear to be running macOS. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
       </div>
 
       <div id="platform-instructions-freebsd" class="instructions" style="display: none;">
         <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		<pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		<pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
         <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.<br/>You appear to be running FreeBSD. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
       </div>
 
@@ -78,7 +78,7 @@
         <!-- duplicate the default cross-platform instructions -->
         <div>
           <p>If you are running Linux, macOS or FreeBSD,<br/>run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		  <pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		  <pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
           <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.</p>
         </div>
 
@@ -97,7 +97,7 @@
         <div>
           <p>To install Haskell, if you are running Linux, macOS or FreeBSD,<br/>run the following
           in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		  <pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		  <pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
           <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.</p>
         </div>
 
@@ -142,7 +142,7 @@
         <div>
           <p>To install Haskell, if you are running Linux, macOS or FreeBSD,<br/>run the following
           in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		  <pre><span class='ghcup-command'>curl https://get-ghcup.haskell.org -sSf | sh</span></pre>
+		  <pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
           <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup/blob/master/README.md#manual-install">other installation methods</a>.</p>
         </div>