diff --git a/java/google/registry/env/production/default/WEB-INF/appengine-web.xml b/java/google/registry/env/production/default/WEB-INF/appengine-web.xml
index 3cd46adeb..ea56fec0b 100644
--- a/java/google/registry/env/production/default/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/production/default/WEB-INF/appengine-web.xml
@@ -8,10 +8,9 @@
   <threadsafe>true</threadsafe>
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4_1G</instance-class>
-  <basic-scaling>
-    <max-instances>100</max-instances>
-    <idle-timeout>30m</idle-timeout>
-  </basic-scaling>
+  <manual-scaling>
+    <instances>100</instances>
+  </manual-scaling>
 
   <system-properties>
     <property name="java.util.logging.config.file"
diff --git a/java/google/registry/env/sandbox/default/WEB-INF/appengine-web.xml b/java/google/registry/env/sandbox/default/WEB-INF/appengine-web.xml
index 33629697b..7d273dde0 100644
--- a/java/google/registry/env/sandbox/default/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/sandbox/default/WEB-INF/appengine-web.xml
@@ -8,10 +8,9 @@
   <threadsafe>true</threadsafe>
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
-  <basic-scaling>
-    <max-instances>100</max-instances>
-    <idle-timeout>30m</idle-timeout>
-  </basic-scaling>
+  <manual-scaling>
+    <instances>100</instances>
+  </manual-scaling>
 
   <system-properties>
     <property name="java.util.logging.config.file"