diff --git a/README.md b/README.md
index f2340d79b..abd85f3a6 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,9 @@ export default [
         // By doing so, some rules in eslint-plugin-svelte will automatically read the configuration and adjust their behavior accordingly.
         // While certain Svelte settings may be statically loaded from svelte.config.js even if you don’t specify it,
         // explicitly specifying it ensures better compatibility and functionality.
+        //
+        // If non-serializable properties are included, running ESLint with the --cache flag will fail.
+        // In that case, please remove the non-serializable properties. (e.g. `svelteConfig: { ...svelteConfig, kit: { ...svelteConfig.kit, typescript: undefined }}`)
         svelteConfig
       }
     }
@@ -143,6 +146,9 @@ export default ts.config(
         // By doing so, some rules in eslint-plugin-svelte will automatically read the configuration and adjust their behavior accordingly.
         // While certain Svelte settings may be statically loaded from svelte.config.js even if you don’t specify it,
         // explicitly specifying it ensures better compatibility and functionality.
+        //
+        // If non-serializable properties are included, running ESLint with the --cache flag will fail.
+        // In that case, please remove the non-serializable properties. (e.g. `svelteConfig: { ...svelteConfig, kit: { ...svelteConfig.kit, typescript: undefined }}`)
         svelteConfig
       }
     }
diff --git a/docs/user-guide.md b/docs/user-guide.md
index 14c061354..f95baec5d 100644
--- a/docs/user-guide.md
+++ b/docs/user-guide.md
@@ -50,6 +50,9 @@ export default [
         // By doing so, some rules in eslint-plugin-svelte will automatically read the configuration and adjust their behavior accordingly.
         // While certain Svelte settings may be statically loaded from svelte.config.js even if you don’t specify it,
         // explicitly specifying it ensures better compatibility and functionality.
+        //
+        // If non-serializable properties are included, running ESLint with the --cache flag will fail.
+        // In that case, please remove the non-serializable properties. (e.g. `svelteConfig: { ...svelteConfig, kit: { ...svelteConfig.kit, typescript: undefined }}`)
         svelteConfig
       }
     }
@@ -108,6 +111,9 @@ export default ts.config(
         // By doing so, some rules in eslint-plugin-svelte will automatically read the configuration and adjust their behavior accordingly.
         // While certain Svelte settings may be statically loaded from svelte.config.js even if you don’t specify it,
         // explicitly specifying it ensures better compatibility and functionality.
+        //
+        // If non-serializable properties are included, running ESLint with the --cache flag will fail.
+        // In that case, please remove the non-serializable properties. (e.g. `svelteConfig: { ...svelteConfig, kit: { ...svelteConfig.kit, typescript: undefined }}`)
         svelteConfig
       }
     }