diff --git a/aiochris/models/public.py b/aiochris/models/public.py
index 0ef670b..09c4e46 100644
--- a/aiochris/models/public.py
+++ b/aiochris/models/public.py
@@ -36,13 +36,12 @@ class PluginParameter(LinkedModel):
     Information about a parameter (a command-line option/flag) of a plugin.
     """
 
-    # FIXME use NewTypes
-    url: str
+    url: PluginParameterUrl
     id: PluginParameterId
-    name: str
-    type: str
+    name: ParameterName
+    type: ParameterType
     optional: bool
-    default: Optional[Any]
+    default: Optional[ParameterType]
     flag: str
     short_flag: str
     action: Literal["store", "store_true", "store_false"]
diff --git a/aiochris/types.py b/aiochris/types.py
index 965b8ae..b250300 100644
--- a/aiochris/types.py
+++ b/aiochris/types.py
@@ -101,3 +101,5 @@
 TagsUrl = NewType("TagsUrl", str)
 TaggingsUrl = NewType("TaggingsUrl", str)
 CommentsUrl = NewType("CommentsUrl", str)
+
+PluginParameterUrl = NewType("PluginParameterUrl", str)