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 391b792e7..ea7cbadb6 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
@@ -9,7 +9,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4_1G</instance-class>
   <basic-scaling>
-    <max-instances>8</max-instances>
+    <max-instances>50</max-instances>
     <idle-timeout>30m</idle-timeout>
   </basic-scaling>
 
diff --git a/java/google/registry/env/production/tools/WEB-INF/appengine-web.xml b/java/google/registry/env/production/tools/WEB-INF/appengine-web.xml
index 0ad010c06..5635943a4 100644
--- a/java/google/registry/env/production/tools/WEB-INF/appengine-web.xml
+++ b/java/google/registry/env/production/tools/WEB-INF/appengine-web.xml
@@ -9,7 +9,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4_1G</instance-class>
   <basic-scaling>
-    <max-instances>50</max-instances>
+    <max-instances>5</max-instances>
     <idle-timeout>10m</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 d5d99c459..da07bd489 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
@@ -9,7 +9,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>8</max-instances>
+    <max-instances>50</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 e773d7d38..8e64412bf 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
@@ -9,7 +9,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>8</max-instances>
+    <max-instances>50</max-instances>
     <idle-timeout>30m</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 94e5f4a84..16d63b98e 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
@@ -9,7 +9,7 @@
   <sessions-enabled>true</sessions-enabled>
   <instance-class>B4</instance-class>
   <basic-scaling>
-    <max-instances>2</max-instances>
+    <max-instances>5</max-instances>
     <idle-timeout>10m</idle-timeout>
   </basic-scaling>