diff --git a/Makefile b/Makefile
index 08df755..f784462 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ FLOWTARGET=$(LIB).flow.js
 FLOWAUX=$(patsubst %.js,%.flow.js,$(AUXTARGETS))
 AUXSCPTS=xlsxworker1.js xlsxworker2.js xlsxworker.js
 FLOWTGTS=$(TARGET) $(AUXTARGETS) $(AUXSCPTS)
-UGLIFYOPTS=--support-ie8
+UGLIFYOPTS=
 
 ## Main Targets