diff --git a/newa/__init__.py b/newa/__init__.py
index e029ec1..02e6462 100644
--- a/newa/__init__.py
+++ b/newa/__init__.py
@@ -342,10 +342,10 @@ class Recipe(Cloneable, Serializable):
 class RecipeConfig(Cloneable, Serializable):
     """ A job recipe configuration """
 
-    fixtures: dict[str, dict] = field(factory=dict)
-    dimensions: dict[str, dict] = field(factory=dict)
+    fixtures: dict[str, dict[str, Any]] = field(factory=dict)
+    dimensions: dict[str, dict[str, Any]] = field(factory=dict)
 
-    def build_requests(self) -> list:
+    def build_requests(self) -> list[Request]:
 
         # this is here to generate unique recipe IDs
         recipe_id_gen = itertools.count(start=1)
@@ -360,7 +360,7 @@ def build_requests(self) -> list:
         for i in range(len(combinations)):
             combinations[i] = (self.fixtures,) + (combinations[i])
 
-        def merge_combination_data(combination):
+        def merge_combination_data(combination: list[dict[str, Any]]) -> dict[str, Any]:
             merged = {}
             for record in combination:
                 for key in record: