diff --git a/manifest.yml b/manifest.yml
index a5d229e6..087ea203 100644
--- a/manifest.yml
+++ b/manifest.yml
@@ -70,6 +70,7 @@ applications:
     path: ./proxy
     # TODO: tweak with load testing
     memory: 100M
+    instances: ((proxy-instances))
     routes:
       - route: ((route-external))
       - route: ((route-external-admin))
diff --git a/vars.development.yml b/vars.development.yml
index 63abf75c..846fbf76 100644
--- a/vars.development.yml
+++ b/vars.development.yml
@@ -9,6 +9,7 @@ web-instances: 1
 admin-instances: 1
 gather-instances: 1
 fetch-instances: 1
+proxy-instances: 1
 memory_quota: 750M
 gather_memory_quota: 1G
 
diff --git a/vars.prod.yml b/vars.prod.yml
index 74fe26b0..78190087 100644
--- a/vars.prod.yml
+++ b/vars.prod.yml
@@ -9,6 +9,7 @@ web-instances: 5
 admin-instances: 1
 gather-instances: 1
 fetch-instances: 4
+proxy-instances: 2
 memory_quota: 850M
 gather_memory_quota: 3G
 
diff --git a/vars.staging.yml b/vars.staging.yml
index d95d9dbc..310984fc 100644
--- a/vars.staging.yml
+++ b/vars.staging.yml
@@ -9,6 +9,7 @@ web-instances: 2
 admin-instances: 1
 gather-instances: 0
 fetch-instances: 0
+proxy-instances: 1
 memory_quota: 850M
 gather_memory_quota: 3G