diff --git a/.gitmodules b/.gitmodules
index 9b3f0f7e..3e64c197 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,9 @@
 [submodule "external/hibou-oca/queue"]
 	path = external/hibou-oca/queue
 	url = https://github.com/hibou-io/oca-queue.git
+[submodule "external/hibou-oca/server-tools"]
+	path = external/hibou-oca/server-tools
+	url = https://github.com/hibou-io/oca-server-tools.git
+[submodule "external/hibou-oca/sale-workflow"]
+	path = external/hibou-oca/sale-workflow
+	url = https://github.com/hibou-io/oca-sale-workflow.git
diff --git a/base_exception b/base_exception
new file mode 120000
index 00000000..c13e831d
--- /dev/null
+++ b/base_exception
@@ -0,0 +1 @@
+./external/hibou-oca/server-tools/base_exception
\ No newline at end of file
diff --git a/external/hibou-oca/sale-workflow b/external/hibou-oca/sale-workflow
new file mode 160000
index 00000000..b351f8d6
--- /dev/null
+++ b/external/hibou-oca/sale-workflow
@@ -0,0 +1 @@
+Subproject commit b351f8d6403600fcfb529af2927e0f2189e4907d
diff --git a/external/hibou-oca/server-tools b/external/hibou-oca/server-tools
new file mode 160000
index 00000000..3425e6c7
--- /dev/null
+++ b/external/hibou-oca/server-tools
@@ -0,0 +1 @@
+Subproject commit 3425e6c7b6ad6210566550e36c578a1e9b98e1f9
diff --git a/sale_exception b/sale_exception
new file mode 120000
index 00000000..f1797a5a
--- /dev/null
+++ b/sale_exception
@@ -0,0 +1 @@
+./external/hibou-oca/sale-workflow/sale_exception
\ No newline at end of file