diff --git a/README.md b/README.md
index b73e930f..f66ed312 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ MACHINES=[{"name": "My Machine", "type": "manual", "ip": "1.2.3.4", "username":
 - awsSecretAccessKey AWS private key
 - awsKeyName private key name
 - awsPrivateKey (Defaults to /opt/back/id_rsa) path to where the key will be stored
-- awsImage (Defaults to ami-09e61366) Nanocloud's execution servers default image)
+- awsImage (Defaults to empty string) Nanocloud's execution servers default image
 - awsFlavor (Defaults to t2.medium) size of virtual machines
 - awsMachineUsername (Defaults to Administrator) administrator account on the machine
 - awsMachinePassword (Defaults to empty string, will be generated if possible) administrator password on the machine
@@ -105,7 +105,7 @@ MACHINES=[{"name": "My Machine", "type": "manual", "ip": "1.2.3.4", "username":
 
 - qemuServiceURL (Default to localhost) url of qemu manager service
 - qemuServicePort (Default to 3000) port of qemu manager service
-- qemuMemory (Default to 4096) memory to allocate to your VMs in MB
+- qemuMemory (Default to 2048) memory to allocate to your VMs in MB
 - qemuCPU (Default to 2) number of vCPU to allocate to your VMs
 - qemuMachineUsername (Defaults to Administrator) windows account username
 - qemuMachinePassword (Defaults empty) windows account password
diff --git a/config/env/development.js b/config/env/development.js
index 1144981c..35473d07 100644
--- a/config/env/development.js
+++ b/config/env/development.js
@@ -97,7 +97,7 @@ module.exports = {
     awsRegion: '',
     awsKeyName: '',
     awsPrivateKey: '/opt/back/id_rsa',
-    awsImage: 'ami-09e61366',
+    awsImage: '',
     awsFlavor: 't2.medium',
     awsMachineUsername: 'Administrator',
     awsMachinePassword: '',
@@ -115,7 +115,7 @@ module.exports = {
 
     qemuServiceURL: 'localhost',
     qemuServicePort: 3000,
-    qemuMemory: '4096',
+    qemuMemory: '2048',
     qemuCPU: '2',
     qemuMachineUsername: 'Administrator',
     qemuMachinePassword: ''