diff --git a/rally-jobs/rally-keystone-api-v2.yaml b/rally-jobs/rally-keystone-api-v2.yaml
index 0c501553..3a526835 100644
--- a/rally-jobs/rally-keystone-api-v2.yaml
+++ b/rally-jobs/rally-keystone-api-v2.yaml
@@ -406,7 +406,7 @@
       runner:
         type: "constant"
         times: 5
-        concurrency: 10
+        concurrency: 5
       context:
         users:
           tenants: 1
@@ -424,7 +424,7 @@
       runner:
         type: "constant"
         times: 5
-        concurrency: 10
+        concurrency: 5
       context:
         users:
           tenants: 1
diff --git a/rally-jobs/rally.yaml b/rally-jobs/rally.yaml
index 19a6d4b9..fd42d526 100644
--- a/rally-jobs/rally.yaml
+++ b/rally-jobs/rally.yaml
@@ -421,7 +421,7 @@
       runner:
         type: "constant"
         times: 5
-        concurrency: 10
+        concurrency: 5
       context:
         users:
           tenants: 1
@@ -439,7 +439,7 @@
       runner:
         type: "constant"
         times: 5
-        concurrency: 10
+        concurrency: 5
       context:
         users:
           tenants: 1