diff --git a/custom.css b/custom.css
index 18f29bd..021465e 100644
--- a/custom.css
+++ b/custom.css
@@ -79,12 +79,12 @@
 
 /* Shake */
 
-img:hover {
+.shake:hover {
   animation: shake 0.5s;
   animation-iteration-count: infinite;
 }
 
-@keyframes shake {
+.shake {
   0% { transform: translate(1px, 1px) rotate(0deg); }
   10% { transform: translate(-1px, -2px) rotate(-1deg); }
   20% { transform: translate(-3px, 0px) rotate(1deg); }