diff --git a/source/bounce.css b/source/bounce.css
index 02a9822..4e6aaf5 100644
--- a/source/bounce.css
+++ b/source/bounce.css
@@ -16,6 +16,11 @@
 	60% {-ms-transform: translateY(-15px);}
 }
 
+@-o-keyframes bounce {
+	0%, 20%, 50%, 80%, 100% {-o-transform: translateY(0);}
+	40% {-o-transform: translateY(-30px);}
+	60% {-o-transform: translateY(-15px);}
+}
 @keyframes bounce {
 	0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
 	40% {transform: translateY(-30px);}