diff --git a/server.js b/server.js
index 0ea9bb3..9c2ecee 100644
--- a/server.js
+++ b/server.js
@@ -52,6 +52,7 @@ function runPython() {
         if (pythonShouldRun) {
             process.stdout.write(' but another request arrive, so we will relaunch it\n');
             pythonShouldRun = false;
+            pythonRunning = false;
             runPython();
         } else {
             process.stdout.write('\n');
diff --git a/views/upload.pug b/views/upload.pug
index 8ab8c3e..642de5f 100644
--- a/views/upload.pug
+++ b/views/upload.pug
@@ -33,6 +33,11 @@ block content
                                 | It may also contain more files, such as
                                 | binary files with neural network weights, or
                                 | such as other python modules.
+                            p.content.has-text-justified
+                                | Please, use as few modules as possible. The
+                                | server won't have pygame or matplotlib, so
+                                | importing those kind of modules in your AI
+                                | will crash the script.
                             p.content.has-text-justified
                                 | Please note that this archive must not
                                 | contain a directory, it must only contain the