diff --git a/README.md b/README.md
index 64ac545..092af2e 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,8 @@
     * Transistor
     * Diode
     * Connector
-    * Oscilator, crystal
+    * Oscilator
+    * Optoisolator
     * Resistor
     * Capacitor