diff --git a/manifest-api-production.yml b/manifest-api-production.yml
index dbf4232e0..489905fbc 100644
--- a/manifest-api-production.yml
+++ b/manifest-api-production.yml
@@ -6,4 +6,4 @@ routes:
   - route: notify-api-production.cloudapps.digital
   - route: api-paas.notifications.service.gov.uk
 instances: 2
-memory: 2G
+memory: 1G
diff --git a/manifest-api-staging.yml b/manifest-api-staging.yml
index 52df8a116..bbe9ffff6 100644
--- a/manifest-api-staging.yml
+++ b/manifest-api-staging.yml
@@ -6,4 +6,4 @@ routes:
   - route: notify-api-staging.cloudapps.digital
   - route: api-paas.staging-notify.works
 instances: 2
-memory: 2G
+memory: 1G
diff --git a/manifest-delivery-production.yml b/manifest-delivery-production.yml
index f6f27d21a..53c8d2f12 100644
--- a/manifest-delivery-production.yml
+++ b/manifest-delivery-production.yml
@@ -3,4 +3,4 @@
 inherit: manifest-delivery-base.yml
 
 instances: 2
-memory: 2G
+memory: 1G
diff --git a/manifest-delivery-staging.yml b/manifest-delivery-staging.yml
index f6f27d21a..53c8d2f12 100644
--- a/manifest-delivery-staging.yml
+++ b/manifest-delivery-staging.yml
@@ -3,4 +3,4 @@
 inherit: manifest-delivery-base.yml
 
 instances: 2
-memory: 2G
+memory: 1G