diff --git a/README-ja.md b/README-ja.md
index 6ddd4c5..d18fe00 100644
--- a/README-ja.md
+++ b/README-ja.md
@@ -57,6 +57,7 @@ Maidroid-Egg Writer 同様, 設置される染料の種類によって, 生成
 |:--|:--|:--|
 |`dye:red`|`maidroid_core:basic`|プレーヤーを追いかけてくる. |
 |`dye:yellow`|`maidroid_core:farming`|農耕をする. |
+|`dye:white`|`maidroid_core:ocr`|プログラムが記述された本を持たせると, そのプログラムを実行する. |
 
 Core が生成されたら早速 Maidroid に埋め込みましょう.
 Maidroid を右クリックし, Core と書かれたスロットに先ほど作成した Core を設置します.
@@ -67,6 +68,7 @@ Maidroid を右クリックし, Core と書かれたスロットに先ほど作
 - bucket
 - default
 - dye
+- [pdisc?](https://github.com/HybridDog/pdisc)
 
 ## Lisense
 
diff --git a/README.md b/README.md
index 24885e4..a666569 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,7 @@ The correspondences of dyes and cores are as follows.
 |:--|:--|:--|
 |`dye:red`|`maidroid_core:basic`|Following the player.|
 |`dye:yello`|`maidroid_core:farming`|Farming.|
+|`dye:white`|`maidroid_core:ocr`|Reading a book written a program, and executing the program.|
 
 When a new core is created, put it to the maidroid.
 Rightclick it, and put the core to the slot labeled `Core`.
@@ -65,6 +66,7 @@ The maidroid will start.
 - bucket
 - default
 - dye
+- [pdisc?](https://github.com/HybridDog/pdisc)
 
 ## Forum Topic
 
diff --git a/maidroid_tool/core_writer.lua b/maidroid_tool/core_writer.lua
index 876ab84..daa7ebd 100644
--- a/maidroid_tool/core_writer.lua
+++ b/maidroid_tool/core_writer.lua
@@ -8,7 +8,7 @@ do -- register core writer
 	local dye_item_map = {
 		["dye:red"]    = "maidroid_core:basic",
 		["dye:yellow"] = "maidroid_core:farming",
-		["dye:white"] = "maidroid_core:ocr",
+		["dye:white"]  = "maidroid_core:ocr",
 	}
 
 	local node_box = {