diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridblock.component.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridblock.component.js
index 1a918638ca..3dfbdab0ff 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridblock.component.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridblock.component.js
@@ -51,7 +51,7 @@
             `
                 ${ model.stylesheet ? `
                     <style>
-                        @import "${model.stylesheet}"
+                        @import "${model.stylesheet}?umb__rnd=${Umbraco.Sys.ServerVariables.application.cacheBuster}"
                     </style>`
                     : ''
                 }
diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridroot.component.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridroot.component.js
index fbda5cf92e..bfa0746a30 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridroot.component.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/blockgrid/umbblockgridroot.component.js
@@ -35,8 +35,8 @@
             shadowRoot.innerHTML = 
             `
                 <style>
-                    {{vm.stylesheet ? "@import '"+vm.stylesheet+"';" : ""}}
-                    @import 'assets/css/blockgridui.css';
+                    {{vm.stylesheet ? "@import '" + vm.stylesheet + "?umb__rnd=${Umbraco.Sys.ServerVariables.application.cacheBuster}';" : ""}}
+                    @import 'assets/css/blockgridui.css?umb__rnd=${Umbraco.Sys.ServerVariables.application.cacheBuster}';
                     :host {
                         --umb-block-grid--grid-columns: ${vm.gridColumns};
                     }