diff --git a/.gitmodules b/.gitmodules
index e55ad32..0e9bd10 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,7 @@
 	path = topic0
 	url = https://github.com/wmitsuda/topic0.git
 	ignore = dirty
+[submodule "chains"]
+	path = chains
+	url = https://github.com/ethereum-lists/chains.git
+	ignore = dirty
diff --git a/chains b/chains
new file mode 160000
index 0000000..af79eb7
--- /dev/null
+++ b/chains
@@ -0,0 +1 @@
+Subproject commit af79eb7387b2a4f747bf31cb318d4f1db43c4d84