diff --git a/hosts/nixos/lapetus/secrets.example.yaml b/hosts/nixos/lapetus/secrets.example.yaml
index 9f2aadb..0f6a0a7 100644
--- a/hosts/nixos/lapetus/secrets.example.yaml
+++ b/hosts/nixos/lapetus/secrets.example.yaml
@@ -12,3 +12,4 @@ microbin_env: |
     MICROBIN_ADMIN_PASSWORD=...
     MICROBIN_UPLOAD_PASSWORD=...
 forgejo_mail_password: ...
+javi_password: ...
diff --git a/hosts/nixos/lapetus/secrets.yaml b/hosts/nixos/lapetus/secrets.yaml
index 3783cfd..22cc542 100644
--- a/hosts/nixos/lapetus/secrets.yaml
+++ b/hosts/nixos/lapetus/secrets.yaml
@@ -6,6 +6,7 @@ invidious_hmac_key: ENC[AES256_GCM,data:eN3NNPYUSfPNnVz3aZK7IrnzoBA=,iv:eHEiB/TK
 cloudflare_tunnel_credentials: ENC[AES256_GCM,data:XuXXzhGdxYsF1ik2g7yS2wbaI08/AF60P8CnIhjJlMd+jRk36QovuBRRjkfV8BjOg0K+2b4yNHT/nS/ZSV6eorj4sbczw6D+p7LxrQfeVqqhXWyCjbJwQTTDFU9XB2xUohmmC1PJ1/nwShfn1LocPxgwWQiNpqwhTJroojzqxTHUBzCuAMmcZ7jwvd0SlDpZIszhbTQoLRzedRZpCdoNnWTc,iv:2oBLU3SvNUwJ2OYfCmyKiocUw9zU+yixO+tY/AE9sxc=,tag:T3v+MII+kDzomiAQJ0zUdg==,type:str]
 microbin_env: ENC[AES256_GCM,data:nxiE9GIvEb0xgqomDdMyy2UtG25pt7h+6JUZkAgIejZbJfsKfpIJcG02WJoj07I2VeTtN10Wd8IbrW9QEt64mLzlG7hqJN0Uwq8bjL1j5IaK,iv:pCWmF52MhMfZtdtMsL7wwt+KB33E/UPNtXzkiJ7NOWE=,tag:79e0u2yyRYckivY85hLqpg==,type:str]
 forgejo_mail_password: ENC[AES256_GCM,data:linrpmA8b+8e1+tWNl0=,iv:Mk7suPq0Jt960Zl9s2jj3SSAKt4t8Lv4eKdIo0o8JbE=,tag:TZ0qGJIVSFSUt/0cqamvdw==,type:str]
+javi_password: ENC[AES256_GCM,data:5Ifh/DclUz0/AL69Th/GckolrjerLOnDW77SOf+/L3v39T+EOYgK2GDNKtWGGWYX5sdxZ9JwLS3ZVsIOnN4zjFhgV+GChJWkkzjdpJEtpHlmmBKlyS31Fw7SixVkL3y3VJhw72aVv3bMKQ==,iv:FzAmvIlrhna5InsQCRrWVdrKZGmHMb0njWdvgBurdYs=,tag:/Iguu2FbdV/4RSGTnFdyYA==,type:str]
 sops:
     kms: []
     gcp_kms: []
@@ -30,8 +31,8 @@ sops:
             RHZ6alYrUU5BZ2xlMkdGR1dWRG5aeGMKJdsdtVZ6Mk9Vo3a+tS+rzAgaF2wpH+8U
             lWhA+c0Kbe8EJT8hm7Vr8PqBmElz4V9AnXSCTp7D+Cu4pfWsHopLUQ==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2024-05-10T22:27:23Z"
-    mac: ENC[AES256_GCM,data:pH8KM1JvO6OK1yGNT90kPfd7+zoUnyoTNfWhCXHBERzLmxHuI8VopCGfgxqYtjyBE4yYAIsRpzJBMPKSnazoL9EBWB+uoSE3UNXMgwTBK/Oq+aW1Bj7akOfCiR9U8yzgfqI7ReAtbioOVO3K/RlgCzpNFdfvToKwm7tUFrektB8=,iv:ltMnlbzIQumavl96q76sv9iYf4IgKrLS2yRZQ1xb83o=,tag:1PILpbzUR7LXaiuukrH3bw==,type:str]
+    lastmodified: "2024-05-21T00:38:43Z"
+    mac: ENC[AES256_GCM,data:/Aq7fQaIQmaG67xqW1P1GMgh8FYSoerR+eLZFRWTjcOaa71ZBt7+a4RAGDqQuoXUYoTxn4bBUKQBBbseMA2Wep9Z5JhGDNtzxVJbLHqVxC8NjLKQUV/M8ycBgTGvxFqHhcTeBbYfoNBgvMsOZpUCe8Utf+Z6BdEAzaDfKkRfT7M=,iv:ndCIVUOLoolhe77wxdUFMXBTKyf21i4dRrKoxtLf92k=,tag:GRXhswxIktIj35p7cJWjKA==,type:str]
     pgp: []
     unencrypted_suffix: _unencrypted
     version: 3.8.1
diff --git a/hosts/nixos/lapetus/services/jupyter.nix b/hosts/nixos/lapetus/services/jupyter.nix
index 650b652..be8bacc 100644
--- a/hosts/nixos/lapetus/services/jupyter.nix
+++ b/hosts/nixos/lapetus/services/jupyter.nix
@@ -1,16 +1,14 @@
 { config, pkgs, ... }:
+# {{{ Jupyterhub/lab env
 let appEnv = pkgs.python3.withPackages (p: with p; [
   jupyterhub
   jupyterlab
   jupyterhub-systemdspawner
   jupyter-collaboration
 ]);
+  # }}}
 in
 {
-  services.nginx.virtualHosts."jupyter.moonythm.dev" =
-    config.satellite.proxy
-      config.services.jupyterhub.port
-      { proxyWebsockets = true; };
 
   services.jupyterhub = {
     enable = true;
@@ -20,25 +18,24 @@ in
     jupyterlabEnv = appEnv;
 
     extraConfig = ''
-      c.Authenticator.allowed_users = {'adrielus', 'prescientmoon'}
-      c.Authenticator.admin_users = {'adrielus', 'prescientmoon'}
+      c.Authenticator.allowed_users = {'adrielus', 'javi'}
+      c.Authenticator.admin_users = {'adrielus', 'javi'}
 
       c.Spawner.notebook_dir='${config.users.users.pilot.home}/projects/notebooks'
-
       c.SystemdSpawner.mem_limit = '2G'
       c.SystemdSpawner.cpu_limit = 2.0
     '';
 
     # {{{ Python 3 kernel
     kernels.python3 =
-      let env = (pkgs.python3.withPackages (pythonPackages: with pythonPackages; [
+      let env = (pkgs.python3.withPackages (p: with p; [
         ipykernel
-        pandas
-        scikit-learn
+        numpy
+        scipy
       ]));
       in
       {
-        displayName = "Python 3 for machine learning";
+        displayName = "Numerical mathematics setup";
         argv = [
           "${env.interpreter}"
           "-m"
@@ -53,7 +50,23 @@ in
     # }}}
   };
 
+  # {{{ Javi user
+  sops.secrets.javi_password = {
+    sopsFile = ../secrets.yaml;
+    neededForUsers = true;
+  };
+
+  users.users.javi.hashedPasswordFile = config.sops.secrets.javi_password.path;
+  # }}}
+  # {{{ Networking
+  services.nginx.virtualHosts."jupyter.moonythm.dev" =
+    config.satellite.proxy
+      config.services.jupyterhub.port
+      { proxyWebsockets = true; };
+  # }}}
+  # {{{ Storage
   environment.persistence."/persist/state".directories = [
     "/var/lib/${config.services.jupyterhub.stateDirectory}"
   ];
+  # }}}
 }