diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..16ffeeb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "external/FastLZ"]
+	path = external/FastLZ
+	url = https://github.com/ariya/FastLZ.git
+[submodule "external/murmurhash"]
+	path = external/murmurhash
+	url = https://github.com/jwerle/murmurhash.c.git
diff --git a/src/external/Timer.h b/external/ChernoTimer/Timer.h
similarity index 100%
rename from src/external/Timer.h
rename to external/ChernoTimer/Timer.h
diff --git a/external/FastLZ b/external/FastLZ
new file mode 160000
index 0000000..b1342da
--- /dev/null
+++ b/external/FastLZ
@@ -0,0 +1 @@
+Subproject commit b1342dabcf5257ab303743c9332fe75e9147a011
diff --git a/external/murmurhash b/external/murmurhash
new file mode 160000
index 0000000..10ba9c2
--- /dev/null
+++ b/external/murmurhash
@@ -0,0 +1 @@
+Subproject commit 10ba9c25abbcf8952b5f4abecf9bf4fc148e8e65