diff --git a/.gitmodules b/.gitmodules
index e1d6031..886328e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,9 +5,6 @@
 [submodule "src/external/webrtc"]
 	path = src/external/webrtc
 	url = https://webrtc.googlesource.com/src
-[submodule "src/external/picojson"]
-	path = src/external/picojson
-	url = https://github.com/kazuho/picojson.git
 [submodule "src/external/vjson"]
 	path = src/external/vjson
 	url = https://github.com/zpostfacto/vjson.git
diff --git a/src/external/picojson b/src/external/picojson
deleted file mode 160000
index 111c9be..0000000
--- a/src/external/picojson
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 111c9be5188f7350c2eac9ddaedd8cca3d7bf394