diff --git a/manifest.toml b/manifest.toml
index 575602b..edf6954 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -81,7 +81,7 @@ ram.runtime = "50M"
     main.url = "/"
 
     [resources.apt]
-    packages = "libxml2-dev,libxslt-dev,libjpeg-dev,libfreetype6,libfreetype6-dev,zlib1g-dev,python3-pip,python3-dev,python3-tk,python3-pil,python3-dev,build-essential,pkg-config,postgresql"
+    packages = "libxml2-dev,libxslt-dev,libjpeg-dev,libfreetype6,libfreetype6-dev,zlib1g-dev,python3-pip,python3-dev,python3-tk,python3-pil,python3-venv,build-essential,pkg-config,postgresql"
 
     [resources.ports]
     # This will pick a random port for reverse-proxying and store it as the $port setting