diff --git a/.gitmodules b/.gitmodules
index fcf2e23c..006eb480 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -21,3 +21,9 @@
 [submodule "third_party/smhasher/smhasher"]
 	path = third_party/smhasher/smhasher
 	url = https://github.com/aappleby/smhasher
+[submodule "third_party/securemessage/securemessage"]
+	path = third_party/securemessage/securemessage
+	url = https://github.com/google/securemessage.git
+[submodule "third_party/google-toolbox-for-mac/google-toolbox-for-mac"]
+	path = third_party/google-toolbox-for-mac/google-toolbox-for-mac
+	url = https://github.com/google/google-toolbox-for-mac.git
diff --git a/third_party/google-toolbox-for-mac/google-toolbox-for-mac b/third_party/google-toolbox-for-mac/google-toolbox-for-mac
new file mode 160000
index 00000000..33941504
--- /dev/null
+++ b/third_party/google-toolbox-for-mac/google-toolbox-for-mac
@@ -0,0 +1 @@
+Subproject commit 339415048005a9eba957357a02459a977a2e3007
diff --git a/third_party/securemessage/securemessage b/third_party/securemessage/securemessage
new file mode 160000
index 00000000..69a02984
--- /dev/null
+++ b/third_party/securemessage/securemessage
@@ -0,0 +1 @@
+Subproject commit 69a02984d4563c6c21132ee882d1d3df1981f5a1