diff --git a/README.md b/README.md
index 8e998296..b4dd1637 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,8 @@ Or on Debian:
 ``` bash
 sudo apt-get -y install tor python3-pip python3-socks imagemagick \
                 python3-numpy python3-setuptools python3-crypto \
-                python3-dateutil python3-pil.imagetk certbot nginx
+                python3-dateutil python3-pil.imagetk python3-idna \
+                certbot nginx
 sudo pip3 install requests commentjson beautifulsoup4 pycryptodome
 ```
 
diff --git a/website/index.html b/website/index.html
index c034ef20..7282cbb5 100644
--- a/website/index.html
+++ b/website/index.html
@@ -1225,7 +1225,7 @@
     </center>
     <p class="intro">On a Debian based system:</p>
     <div class="shell">
-      <p>sudo apt-get -y install tor python3-pip python3-socks imagemagick python3-numpy python3-setuptools python3-crypto python3-dateutil python3-pil.imagetk certbot</p>
+      <p>sudo apt-get -y install tor python3-pip python3-socks imagemagick python3-numpy python3-setuptools python3-crypto python3-dateutil python3-pil.imagetk python3-idna certbot nginx</p>
       <p>sudo pip3 install commentjson beautifulsoup4 pycryptodome</p>
     </div>