diff --git a/src/interfaces/utils.tsx b/src/interfaces/utils.tsx
new file mode 100644
index 0000000..28ce69e
--- /dev/null
+++ b/src/interfaces/utils.tsx
@@ -0,0 +1,8 @@
+/**
+ * A Generic dictionary with the value of a specific type.
+ *
+ * Keys _must_ be strings.
+ */
+export interface Dictionary<T> {
+    [Key: string]: T;
+}
diff --git a/src/types/Account.tsx b/src/types/Account.tsx
index a6454a9..5fb1504 100644
--- a/src/types/Account.tsx
+++ b/src/types/Account.tsx
@@ -14,6 +14,7 @@ export type Account = {
     followers_count: number;
     following_count: number;
     statuses_count: number;
+    last_status_at: string;
     note: string;
     url: string;
     avatar: string;
diff --git a/src/types/History.tsx b/src/types/History.tsx
new file mode 100644
index 0000000..22176bd
--- /dev/null
+++ b/src/types/History.tsx
@@ -0,0 +1,5 @@
+export type History = {
+    day: string;
+    uses: number;
+    accounts: number;
+};
diff --git a/src/types/Tag.tsx b/src/types/Tag.tsx
index f12ccf2..d03b269 100644
--- a/src/types/Tag.tsx
+++ b/src/types/Tag.tsx
@@ -1,4 +1,7 @@
+import { History } from "./History";
+
 export type Tag = {
     name: string;
     url: string;
+    history?: [History];
 };