diff --git a/.gitmodules b/.gitmodules
index 4e2b5dee..434630fe 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
-[submodule "dcalcimages"]
+[submodule "images"]
 	path = images
-	url = https://gitee.com/i_melon/dcalcimages.git
+	url = https://gitee.com/dnftools/dcalcimages.git
diff --git a/README.md b/README.md
index 8ee602b7..7cae932e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 ### clone
 
-git clone --single-branch --branch master https://gitee.com/dnftools/dcalc.git
+git clone --recurse-submodules --single-branch --branch master https://gitee.com/dnftools/dcalc.git
 
 ### frontend
 
diff --git a/images b/images
new file mode 160000
index 00000000..90d5ec13
--- /dev/null
+++ b/images
@@ -0,0 +1 @@
+Subproject commit 90d5ec132d15a951486efd83458959cbcd5844fc