diff --git a/docs/lib.md b/docs/lib.md
index 970eef52..6b79fe1d 100644
--- a/docs/lib.md
+++ b/docs/lib.md
@@ -105,7 +105,7 @@ subset of `parser_mod_list()`.
 ### parser\_info
 
 ```python
-def parser_info(parser_mod_name: str) -> Optional[Dict]
+def parser_info(parser_mod_name: str) -> Dict
 ```
 
 Returns a dictionary that includes the module metadata.
@@ -118,7 +118,7 @@ This function will accept **module_name**, **cli-name**, and
 ### all\_parser\_info
 
 ```python
-def all_parser_info() -> List[Optional[Dict]]
+def all_parser_info() -> List[Dict]
 ```
 
 Returns a list of dictionaries that includes metadata for all modules.