diff --git a/.gitmodules b/.gitmodules
index bc6d5e0..1dcbd52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
-[submodule "essent"]
-	path = essent
-	url = git@socks.lbl.gov:sbeamer/essent.git
-[submodule "firrtl-sig"]
-	path = firrtl-sig
-	url = git@socks.lbl.gov:sbeamer/firrtl-sig.git
+[submodule "SimpleJSON"]
+	path = SimpleJSON
+	url = https://github.com/nbsdx/SimpleJSON.git
diff --git a/SimpleJSON b/SimpleJSON
new file mode 160000
index 0000000..8dd3e9b
--- /dev/null
+++ b/SimpleJSON
@@ -0,0 +1 @@
+Subproject commit 8dd3e9b84a0b532c46f22f402bafb2c4cf8621eb
diff --git a/essent b/essent
index cbefe21..3eafc4d 160000
--- a/essent
+++ b/essent
@@ -1 +1 @@
-Subproject commit cbefe21c6e3c0b5f31ba3812b4a1a56064be32e9
+Subproject commit 3eafc4d5c9f48939a10ee0fe82b6a0c063fcd212