diff --git a/README.md b/README.md
index 2014026..c760ff9 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ UUID('c4e21057-6b8a-4dc0-8000-000000000000')
 Notice that this is a truncated [UUID](https://docs.python.org/3/library/uuid.html), with everything beyond the first
 eight bytes zeroed out.
 
-Once you have am ID, you can run `slugify_uuid` on it to get your slug.
+Once you have an ID, you can run `slugify_uuid` on it to get your slug.
 
 ```
 >>> from short_stuff import gen_unique_id, slugify
diff --git a/short_stuff/lib.py b/short_stuff/lib.py
index ee98961..519e2fc 100644
--- a/short_stuff/lib.py
+++ b/short_stuff/lib.py
@@ -76,8 +76,8 @@ class ShortUIDConverter:
     """
     regex = r'[-a-zA-Z0-9_]{1,22}'
 
-    def to_python(self, value):
+    def to_python(self, value: str) -> UUID:
         return unslugify(value)
 
-    def to_url(self, value):
+    def to_url(self, value: UUID) -> str:
         return slugify(value)