diff --git a/Library/Homebrew/sbom.rb b/Library/Homebrew/sbom.rb
index d92e022d70785b..abdc98b865e8ba 100644
--- a/Library/Homebrew/sbom.rb
+++ b/Library/Homebrew/sbom.rb
@@ -145,7 +145,7 @@ def generate_relations_json(runtime_dependency_declaration, compiler_declaration
     runtime + patches + base
   end
 
-  sig { params(runtime_dependency_declaration: T::Array[Hash], compiler_declaration: Hash).returns(T::Array[Hash]) }
+  sig { params(runtime_dependency_declaration: T::Array[Hash], compiler_declaration: Hash).returns(T::Array[T::Hash[Symbol, T.any(String, T::Array[T::Hash[Symbol, String]])]]) }
   def generate_packages_json(runtime_dependency_declaration, compiler_declaration)
     bottle = []
     if get_bottle_info(source["bottle"])
@@ -197,7 +197,7 @@ def generate_packages_json(runtime_dependency_declaration, compiler_declaration)
     ] + runtime_dependency_declaration + compiler_declaration.values + bottle
   end
 
-  sig { returns(Hash) }
+  sig { returns(T::Hash[Symbol, T.any(String, T::Array[T::Hash[Symbol, String]])]]) }
   def to_spdx_sbom
     runtime_full = []
 
@@ -278,7 +278,7 @@ def to_spdx_sbom
     }
   end
 
-  sig { params(formula: Formula, deps: T::Array[Dependency]).returns(T::Array[Hash]) }
+  sig { params(formula: Formula, deps: T::Array[Dependency]).returns(T::Array[T::Hash[Symbol, String]]) }
   def self.runtime_deps_hash(formula, deps)
     deps.map do |dep|
       f = dep.to_formula
@@ -297,7 +297,7 @@ def self.runtime_deps_hash(formula, deps)
 
   private
 
-  sig { params(base: T::Hash[String, Hash]).returns(T.nilable(Hash)) }
+  sig { params(base: T::Hash[String, Hash]).returns(T.nilable(T::Hash[String,String])) }
   def get_bottle_info(base)
     return unless base.key?("files")