diff --git a/pkg/nanopb/Makefile b/pkg/nanopb/Makefile
index 57775fd574..e2d2209b71 100644
--- a/pkg/nanopb/Makefile
+++ b/pkg/nanopb/Makefile
@@ -1,6 +1,7 @@
 PKG_NAME=nanopb
 PKG_URL=https://github.com/nanopb/nanopb
-PKG_VERSION=nanopb-0.4.9.1
+# 0.4.9.1
+PKG_VERSION=cad3c18ef15a663e30e3e43e3a752b66378adec1
 PKG_LICENSE=MIT
 
 include $(RIOTBASE)/pkg/pkg.mk