diff --git a/packages/client/hmi-client/src/assets/css/theme/_variables.scss b/packages/client/hmi-client/src/assets/css/theme/_variables.scss
index c0c0b4e25d..e9a9d56521 100644
--- a/packages/client/hmi-client/src/assets/css/theme/_variables.scss
+++ b/packages/client/hmi-client/src/assets/css/theme/_variables.scss
@@ -940,5 +940,6 @@ $petri-inputBox: var(--surface-0);
 	--overlayMenuShadowHover: 0 0 0 1px rgba(0, 0, 0, 0.1), 0 2px 8px 0 rgba(0, 0, 0, 0.3);
 	--node-header: #7b8498;
 	--node-header-hover: var(--text-color-subdued);
-	--z-index-modal: 1000
+	--z-index-modal: 1000;
+	--keyboard-zindex: calc(var(--z-index-modal) + 100);
 }
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