diff --git a/java/google/registry/env/alpha/backend/WEB-INF/appengine-web.xml b/java/google/registry/env/alpha/backend/WEB-INF/appengine-web.xml
index 774b7de5a..c0e446e70 100644
--- a/java/google/registry/env/alpha/backend/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/alpha/backend/WEB-INF/appengine-web.xml
@@ -8,7 +8,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>10</max-instances>
+    <max-instances>8</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>
 
diff --git a/java/google/registry/env/alpha/default/WEB-INF/appengine-web.xml b/java/google/registry/env/alpha/default/WEB-INF/appengine-web.xml
index 7c5654228..da59be7d3 100644
--- a/java/google/registry/env/alpha/default/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/alpha/default/WEB-INF/appengine-web.xml
@@ -6,9 +6,9 @@
   <module>default</module>
   <threadsafe>true</threadsafe>
   <sessions-enabled>true</sessions-enabled>
-  <instance-class>B4_1G</instance-class>
+  <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>10</max-instances>
+    <max-instances>8</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>
 
diff --git a/java/google/registry/env/alpha/tools/WEB-INF/appengine-web.xml b/java/google/registry/env/alpha/tools/WEB-INF/appengine-web.xml
index 0a82b840c..c457c723b 100644
--- a/java/google/registry/env/alpha/tools/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/alpha/tools/WEB-INF/appengine-web.xml
@@ -6,9 +6,9 @@
   <module>tools</module>
   <threadsafe>true</threadsafe>
   <sessions-enabled>true</sessions-enabled>
-  <instance-class>B4_1G</instance-class>
+  <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>100</max-instances>
+    <max-instances>2</max-instances>
     <idle-timeout>5m</idle-timeout>
   </basic-scaling>
 
diff --git a/java/google/registry/env/sandbox/backend/WEB-INF/appengine-web.xml b/java/google/registry/env/sandbox/backend/WEB-INF/appengine-web.xml
index ece64f711..1b874a71e 100644
--- a/java/google/registry/env/sandbox/backend/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/sandbox/backend/WEB-INF/appengine-web.xml
@@ -8,7 +8,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>50</max-instances>
+    <max-instances>8</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>
 
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 c962d22d8..0f8942ebe 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
@@ -6,9 +6,9 @@
   <module>default</module>
   <threadsafe>true</threadsafe>
   <sessions-enabled>true</sessions-enabled>
-  <instance-class>B4_1G</instance-class>
+  <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>20</max-instances>
+    <max-instances>8</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>
 
diff --git a/java/google/registry/env/sandbox/tools/WEB-INF/appengine-web.xml b/java/google/registry/env/sandbox/tools/WEB-INF/appengine-web.xml
index 9e8bcb777..4e1800c41 100644
--- a/java/google/registry/env/sandbox/tools/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/sandbox/tools/WEB-INF/appengine-web.xml
@@ -8,7 +8,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>50</max-instances>
+    <max-instances>2</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>