diff --git a/api/v1/postgres_types.go b/api/v1/postgres_types.go
index eea7d98e..40963248 100644
--- a/api/v1/postgres_types.go
+++ b/api/v1/postgres_types.go
@@ -102,6 +102,8 @@ type Backup struct {
 type Size struct {
 	// CPU is in the format as pod.spec.resource.request.cpu
 	CPU string `json:"cpu,omitempty"`
+	// Memory is in the format as pod.spec.resource.request.memory
+	Memory string `json:"memory,omitempty"`
 	// SharedBuffer of the database
 	SharedBuffer string `json:"sharedBuffer,omitempty"`
 
diff --git a/config/crd/bases/database.fits.cloud_postgres.yaml b/config/crd/bases/database.fits.cloud_postgres.yaml
index e16bb69d..e998b223 100644
--- a/config/crd/bases/database.fits.cloud_postgres.yaml
+++ b/config/crd/bases/database.fits.cloud_postgres.yaml
@@ -123,6 +123,9 @@ spec:
                   cpu:
                     description: CPU is in the format as pod.spec.resource.request.cpu
                     type: string
+                  memory:
+                    description: Memory is in the format as pod.spec.resource.request.memory
+                    type: string
                   sharedBuffer:
                     description: SharedBuffer of the database
                     type: string
diff --git a/controllers/postgres_controller.go b/controllers/postgres_controller.go
index 2b1ae4bb..7156ab9f 100644
--- a/controllers/postgres_controller.go
+++ b/controllers/postgres_controller.go
@@ -265,6 +265,7 @@ func patchRawZ(out *zalando.Postgresql, in *pg.Postgres) {
 	out.Spec.PostgresqlParam.PgVersion = in.Spec.Version
 
 	out.Spec.ResourceRequests.CPU = in.Spec.Size.CPU
+	out.Spec.ResourceRequests.Memory = in.Spec.Size.Memory
 
 	// todo: Check if the validation should be performed here.
 	out.Spec.Volume.Size = in.Spec.Size.StorageSize