diff --git a/Buildings/Resources/bin/ConvertWeatherData.jar b/Buildings/Resources/bin/ConvertWeatherData.jar
index 2fec94566b6..72c3ca93cf8 100644
Binary files a/Buildings/Resources/bin/ConvertWeatherData.jar and b/Buildings/Resources/bin/ConvertWeatherData.jar differ
diff --git a/Buildings/Resources/src/convertEPW/src/Makefile b/Buildings/Resources/src/convertEPW/src/Makefile
index ada2d56027d..30d215a2001 100644
--- a/Buildings/Resources/src/convertEPW/src/Makefile
+++ b/Buildings/Resources/src/convertEPW/src/Makefile
@@ -22,7 +22,7 @@ OBJS = ConvertWeatherData.class
 JARS = ConvertWeatherData.jar
 #######################################################
 all: clean doc
-	$(JC) $(SRCS)
+	$(JC) --release 8 $(SRCS)
 	$(JJ) $(JFLAGS) $(JARS) Manifest.txt $(OBJS) $(SRCS)
 	$(JJ) -i $(JARS)
 	rm $(OBJS)