diff --git a/README.md b/README.md
index 5b33368..8654357 100644
--- a/README.md
+++ b/README.md
@@ -1173,6 +1173,8 @@ Contrary to popular belief, there is no issue in utilizing raw escape sequences.
 | `\e[4m` | Underline text. |
 | `\e[5m` | Slow blink. |
 | `\e[7m` | Swap foreground and background colors. |
+| `\e[8m` | Hidden text. |
+| `\e[9m` | Strike-through text. |
 
 
 ## Cursor Movement
diff --git a/manuscript/chapter7.txt b/manuscript/chapter7.txt
index 8f4ad8c..2ea64e1 100644
--- a/manuscript/chapter7.txt
+++ b/manuscript/chapter7.txt
@@ -24,6 +24,8 @@ Contrary to popular belief, there is no issue in utilizing raw escape sequences.
 | `\e[4m` | Underline text. |
 | `\e[5m` | Slow blink. |
 | `\e[7m` | Swap foreground and background colors. |
+| `\e[8m` | Hidden text. |
+| `\e[9m` | Striket-hrough text. |
 
 
 ## Cursor Movement