diff --git a/.gitmodules b/.gitmodules
index b130482..7f5e801 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,7 @@
 #
 # Copyright 2021 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com>
 # SPDX-License-Identifier: CC-BY-SA-4.0
+[submodule "Tesseract"]
+	path = Tesseract
+	url = https://gitlab.com/libre-knowledge/tesseract.git
+	ignore = dirty
diff --git a/README.md b/README.md
index ca72c06..3175d29 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,8 @@
 
 ## 軟體實現<br>Software implementations
 
-* [Tesseract](
+* [Tesseract](https://gitlab.com/libre-knowledge/tesseract)  
+  開放來源碼的光學字元辨識引擎
 
 ## 參考資料
 
diff --git a/Tesseract b/Tesseract
new file mode 160000
index 0000000..85f8da9
--- /dev/null
+++ b/Tesseract
@@ -0,0 +1 @@
+Subproject commit 85f8da97a315d4c6f269ea75222409a7cba78774