diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..be9b290
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<constraints>
+    <hardware>
+      <physicalmemory>
+        <size unit="G">12</size>
+      </physicalmemory>
+    </hardware>
+</constraints>
+
diff --git a/mdbook.changes b/mdbook.changes
index 711eba1..ec915f9 100644
--- a/mdbook.changes
+++ b/mdbook.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Nov  7 03:28:17 UTC 2022 - Soc Virnyl Estela <socvirnyl.estela@gmail.com>
+
+- Add _constraints and increase memory to 12G.
+
 -------------------------------------------------------------------
 Sat Nov  5 11:42:04 UTC 2022 - Soc Virnyl Estela <socvirnyl.estela@gmail.com>