diff --git a/src/lib/types.ts b/src/lib/types.ts
index 6a92e2b..b48d68a 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -8,3 +8,14 @@ export type Document = {
   campaign: Campaign;
   data: {};
 };
+
+export type Session = Document & {
+  strongStart: string;
+};
+
+export type ISO8601Date = string & { __type: "iso8601date" };
+
+export type Secret = Document & {
+  text: string;
+  discoveredOn: ISO8601Date;
+};