diff --git a/lit_nlp/examples/gcp/requirements.txt b/lit_nlp/examples/gcp/requirements.txt
index a1a77354..d5ee763a 100644
--- a/lit_nlp/examples/gcp/requirements.txt
+++ b/lit_nlp/examples/gcp/requirements.txt
@@ -18,4 +18,5 @@
 google-cloud-aiplatform>=1.60.0
 gunicorn>=20.1.0
 lit-nlp>=1.2
-vertexai>=1.49.0
\ No newline at end of file
+vertexai>=1.49.0
+webtest>=2.0
\ No newline at end of file