diff --git a/ansible/roles/gsm-tester/tasks/main.yml b/ansible/roles/gsm-tester/tasks/main.yml
index 6258fde8..7f0bad15 100644
--- a/ansible/roles/gsm-tester/tasks/main.yml
+++ b/ansible/roles/gsm-tester/tasks/main.yml
@@ -217,6 +217,7 @@
     - python3-mako
     - python3-gi
     - python3-numpy
+    - python3-websocket
     - ofono
     - patchelf
     - libcap2-bin