diff --git a/requirements.txt b/requirements.txt
index 56dc9bd..4c8afea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,9 @@ python-multipart>=0.0.6
 PyYAML>=6.0
 asyncpg>=0.29.0
 markdown>=3.5.0
+# Common effect dependencies (used by uploaded effects)
+numpy>=1.24.0
+opencv-python-headless>=4.8.0
 # Core artdag from GitHub (tracks main branch)
 git+https://github.com/gilesbradshaw/art-dag.git@main
 # Shared components