diff --git a/cs623/proj1/Makefile b/cs623/proj1/Makefile
index 5c79e8f..1a93c3c 100644
--- a/cs623/proj1/Makefile
+++ b/cs623/proj1/Makefile
@@ -7,9 +7,13 @@ all: $(CLASSES)
 %.class: %.java
 	javac $^
 
+.PHONY: jar
+jar: $(CLASSES)
+	jar cvf $(MAINCLASS).jar *.class
+
 .PHONY: run
 run: $(CLASSES)
 	java $(MAINCLASS)
 
 clean:
-	-rm -f *.class
+	-rm -f *.class *.jar
diff --git a/cs623/proj1/RetirementCalculator.html b/cs623/proj1/RetirementCalculator.html
index 1f26952..d397e2e 100644
--- a/cs623/proj1/RetirementCalculator.html
+++ b/cs623/proj1/RetirementCalculator.html
@@ -15,7 +15,7 @@
     <h2>Retirement Planning Calculator</h2>
     <h4>Ballpark Estimate by American Savings Education Council</h4>
 
-    <applet code="RetirementCalculator.class" width="600" height="450">
+    <applet archive="RetirementCalculator.jar" code="RetirementCalculator.class" width="600" height="450">
     </applet>
 
 </body>