diff --git a/CHANGELOG.md b/CHANGELOG.md
index 096ebae..9992ce3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [1.2.1] - April 29, 2021
+
++ z-index CSS property
+
 ## [1.2.0] - April 28, 2021
 
 New methods:
diff --git a/src/panel-style.css b/src/panel-style.css
index 57c8cce..ffeae79 100644
--- a/src/panel-style.css
+++ b/src/panel-style.css
@@ -1,4 +1,5 @@
 :root {
+    --panel-z-index: 1001;
     --panel-background-color: #fff;
     --panel-box-shadow: 0 0 4px rgba(204, 204, 204, 0.75);
     --panel-width: 160px;
@@ -13,6 +14,7 @@
 .jspanel {
     box-sizing: border-box;
     position: absolute;
+    z-index: var(--panel-z-index, 1001);
     background-color: var(--panel-background-color, #fff);
     box-shadow: var(--panel-box-shadow, 0 0 4px rgba(204, 204, 204, 0.75));
     border-radius: 5px;