diff --git a/install_minimal/include/airtime-install.php b/install_minimal/include/airtime-install.php
index 8f66d61f2..3ed307052 100644
--- a/install_minimal/include/airtime-install.php
+++ b/install_minimal/include/airtime-install.php
@@ -62,7 +62,14 @@ if (isset($version) && ($version != false) && ($version == AIRTIME_VERSION) && !
 // A previous version exists - if so, upgrade.
 if (isset($version) && ($version != false) && ($version < AIRTIME_VERSION) && !isset($opts->r)) {
     echo "Airtime version $version found.".PHP_EOL;
-
+    
+    // remove virtualenv and reinstall
+    if(strcmp($version, '1.9.0') >= 0){
+        exec("rm -rf /usr/lib/airtime/airtime_virtualenv");
+        echo "Reinstalling virtualenv...".PHP_EOL;
+        passthru(__DIR__."/../../python_apps/python-virtualenv/virtualenv-install.sh");
+    }
+    
     require_once("airtime-upgrade.php");
     exit(0);
 }