diff --git a/lib/thrift/exceptions.ex b/lib/thrift/exceptions.ex
index ae03470..c017b60 100644
--- a/lib/thrift/exceptions.ex
+++ b/lib/thrift/exceptions.ex
@@ -1,6 +1,8 @@
 defmodule Thrift.TApplicationException do
   defexception message: nil, type: nil
 
+  alias Thrift.Protocol
+
   @exception_mappings %{
     unknown_method: 1,
     invalid_message_type: 2,
diff --git a/lib/thrift/parser/file_group.ex b/lib/thrift/parser/file_group.ex
index c7f860a..1f7b429 100644
--- a/lib/thrift/parser/file_group.ex
+++ b/lib/thrift/parser/file_group.ex
@@ -8,6 +8,7 @@ defmodule Thrift.Parser.FileGroup do
   files.
   """
 
+  alias Thrift.Parser
   alias Thrift.Parser.{
     FileGroup,
     FileRef,
diff --git a/lib/thrift/parser/models.ex b/lib/thrift/parser/models.ex
index 916a696..085e70f 100644
--- a/lib/thrift/parser/models.ex
+++ b/lib/thrift/parser/models.ex
@@ -49,7 +49,7 @@ defmodule Thrift.Parser.Models do
     Constants of any primitive or container type can be created in Thrift.
     """
 
-    @type t :: %Constant{name: String.t, value: Literal.t, type: Types.t}
+    @type t :: %Constant{name: String.t, value: Literals.t, type: Types.t}
 
     @enforce_keys [:name, :value, :type]
     defstruct name: nil, value: nil, type: nil