diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5ef3081395..3dc48a8946 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -61,6 +61,8 @@ update-knapsack:
     - scripts/merge-reports knapsack/rspec_report.json knapsack/rspec_node_*.json
     - scripts/merge-reports knapsack/spinach_report.json knapsack/spinach_node_*.json
     - rm -f knapsack/*_node_*.json
+  only:
+    - master
 
 # Execute all testing suites