diff --git a/.gitmodules b/.gitmodules
index fe93929..0a4ce63 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,9 @@
 [submodule "external/CMSIS_5"]
 	path = external/CMSIS_5
 	url = https://github.com/ARM-software/CMSIS_5
+	ignore = dirty
+
 [submodule "external/printf"]
 	path = external/printf
 	url = https://github.com/mpaland/printf
+	ignore = dirty