diff --git a/tools/flex/Makefile b/tools/flex/Makefile
index cc32da3ed0..d949d4bf31 100644
--- a/tools/flex/Makefile
+++ b/tools/flex/Makefile
@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=flex
-PKG_VERSION:=2.5.38
+PKG_VERSION:=2.5.39
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)
-PKG_MD5SUM:=b230c88e65996ff74994d08a2a2e0f27
+PKG_MD5SUM:=77d44c6bb8c0705e0017ab9a84a1502b
 PKG_CAT:=bzcat
 
 HOST_BUILD_PARALLEL:=1