diff --git a/.gitmodules b/.gitmodules
index 895b94d..4d3d3c4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,12 @@
 [submodule "bibretrieve"]
 	path = bibretrieve
 	url = https://github.com/pzorin/bibretrieve.git
+[submodule "emacs-git-gutter"]
+	path = emacs-git-gutter
+	url = https://github.com/syohex/emacs-git-gutter.git
+[submodule "emacs-git-gutter-fringe"]
+	path = emacs-git-gutter-fringe
+	url = https://github.com/syohex/emacs-git-gutter-fringe.git
+[submodule "fringe-helper.el"]
+	path = fringe-helper.el
+	url = https://github.com/nschum/fringe-helper.el.git
diff --git a/emacs-git-gutter b/emacs-git-gutter
new file mode 160000
index 0000000..f7da178
--- /dev/null
+++ b/emacs-git-gutter
@@ -0,0 +1 @@
+Subproject commit f7da1781df94c0eedf01ca2dcafdefb3dca6381e
diff --git a/emacs-git-gutter-fringe b/emacs-git-gutter-fringe
new file mode 160000
index 0000000..cecaf71
--- /dev/null
+++ b/emacs-git-gutter-fringe
@@ -0,0 +1 @@
+Subproject commit cecaf710cc2ddbcb7a9c4c0706550179d0efeba4
diff --git a/fringe-helper.el b/fringe-helper.el
new file mode 160000
index 0000000..c02fae1
--- /dev/null
+++ b/fringe-helper.el
@@ -0,0 +1 @@
+Subproject commit c02fae16cda709f102dee56338075e257240b385