diff --git a/responsiveslides.css b/responsiveslides.css
index 1c63bd3..794fb91 100644
--- a/responsiveslides.css
+++ b/responsiveslides.css
@@ -31,15 +31,15 @@
   border: 0;
   }
 
-.rslides .rslides1_on {
+.csstransitions.rslides .rslides1_on {
   opacity: 1;
-	}
+  }
 
-.rslides li { /* Change duration when using option "speed" */
-	opacity: 0;
-	transition: opacity 1s ease-in-out;
-	-o-transition: opacity 1s ease-in-out;
-	-ms-transition: opacity 1s ease-in-out;
-	-moz-transition: opacity 1s ease-in-out;
-	-webkit-transition: opacity 1s ease-in-out;
-	}
\ No newline at end of file
+.csstransitions .rslides li { /* Change duration when using option "speed" */
+  opacity: 0;
+  transition: opacity 1s ease-in-out;
+  -o-transition: opacity 1s ease-in-out;
+  -ms-transition: opacity 1s ease-in-out;
+  -moz-transition: opacity 1s ease-in-out;
+  -webkit-transition: opacity 1s ease-in-out;
+  }
\ No newline at end of file