diff --git a/README.md b/README.md
index 43e330f..56b0fdd 100644
--- a/README.md
+++ b/README.md
@@ -37,3 +37,8 @@ CREATE TABLE IF NOT EXISTS query_cache_tags (
 ### Other Utilities
 
 - `classNames`: Cleans and joins an array of inputs with possible undefined or boolean values. Useful for tailwind classnames.
+
+### Types
+
+- `CacheTag`: A branded type for cache tags.
+- `CacheTagsInvalidateWebhook`: The payload of the DatoCMS cache tags invalidate webhook.
diff --git a/src/types.ts b/src/types.ts
index 281a580..e6cdedc 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1 +1,13 @@
 export type CacheTag = string & { readonly _: unique symbol };
+
+export type CacheTagsInvalidateWebhook = {
+  entity_type: 'cda_cache_tags';
+  event_type: 'invalidate';
+  entity: {
+    id: 'cda_cache_tags';
+    type: 'cda_cache_tags';
+    attributes: {
+      tags: CacheTag[];
+    };
+  };
+};