diff --git a/bi/core.css b/bi/core.css
index 9d2ea47015..ea14d4760b 100644
--- a/bi/core.css
+++ b/bi/core.css
@@ -3058,7 +3058,7 @@ i {
   background: #1a1a1a;
   opacity: 0.2;
   filter: alpha(opacity=20);
-  z-index: 1000000000;
+  z-index: 1000000000 !important;
 }
 .bi-theme-dark .bi-resizer {
   background: #ffffff;
diff --git a/docs/core.css b/docs/core.css
index 9d2ea47015..ea14d4760b 100644
--- a/docs/core.css
+++ b/docs/core.css
@@ -3058,7 +3058,7 @@ i {
   background: #1a1a1a;
   opacity: 0.2;
   filter: alpha(opacity=20);
-  z-index: 1000000000;
+  z-index: 1000000000 !important;
 }
 .bi-theme-dark .bi-resizer {
   background: #ffffff;
diff --git a/src/css/core/utils/common.css b/src/css/core/utils/common.css
index 028c37ac3c..4a183f0d9c 100644
--- a/src/css/core/utils/common.css
+++ b/src/css/core/utils/common.css
@@ -105,7 +105,7 @@
   background: #1a1a1a;
   opacity: 0.2;
   filter: alpha(opacity=20);
-  z-index: 1000000000;
+  z-index: 1000000000 !important;
 }
 .bi-theme-dark .bi-resizer {
   background: #ffffff;
diff --git a/src/less/core/utils/common.less b/src/less/core/utils/common.less
index 4f9c766a91..7a2629ab91 100644
--- a/src/less/core/utils/common.less
+++ b/src/less/core/utils/common.less
@@ -148,7 +148,7 @@
 .bi-resizer {
   background: @color-bi-background-black;
   .opacity(0.2);
-  z-index: @zIndex-tip;
+  z-index: @zIndex-tip !important;
 }
 
 .bi-theme-dark {