diff --git a/.gitmodules b/.gitmodules
index 60d4e416e..1f8f68ed6 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,4 +5,4 @@
 [submodule "external/cecil"]
 	path = external/cecil
 	url = https://github.com/mono/cecil.git
-	branch = master
+	branch = mono-2017-06
diff --git a/external/cecil b/external/cecil
index bc11f4729..c0eb983da 160000
--- a/external/cecil
+++ b/external/cecil
@@ -1 +1 @@
-Subproject commit bc11f472954694ebd92ae4956f110c1036a7c2e0
+Subproject commit c0eb983dac62519d3ae93a689312076aacecb723