diff --git a/lib/httpoison/base.ex b/lib/httpoison/base.ex
index 745c8a1..9d67883 100644
--- a/lib/httpoison/base.ex
+++ b/lib/httpoison/base.ex
@@ -952,7 +952,16 @@ defmodule HTTPoison.Base do
        headers: process_response_headers.(headers),
        request: request,
        request_url: request.url,
-       redirect_url: :proplists.get_value("Location", headers, nil)
+       redirect_url: get_header(headers, "Location", nil)
      }}
   end
+
+  defp get_header(headers, key, default) do
+    key = String.downcase(key)
+
+    Enum.find_value(headers, default, fn
+      {k, v} -> if String.downcase(k) == key, do: v, else: nil
+      _ -> nil
+    end)
+  end
 end
diff --git a/test/httpoison_base_test.exs b/test/httpoison_base_test.exs
index 16e5309..a43b707 100644
--- a/test/httpoison_base_test.exs
+++ b/test/httpoison_base_test.exs
@@ -569,31 +569,36 @@ defmodule HTTPoisonBaseTest do
              }
   end
 
-  test "request returns MaybeRedirect when passing follow_redirect option" do
-    expect(:hackney, :request, fn :post,
-                                  "http://localhost",
-                                  [],
-                                  "body",
-                                  [follow_redirect: true] ->
-      # Mock a redirect from `http://localhost` to `https://localhost`
-      {:ok, {:maybe_redirect, 302, _headers = [{"Location", "https://localhost"}], :client}}
-    end)
-
-    assert HTTPoison.post!("localhost", "body", [], follow_redirect: true) ==
-             %HTTPoison.MaybeRedirect{
-               status_code: 302,
-               headers: [{"Location", "https://localhost"}],
-               request_url: "http://localhost",
-               request: %HTTPoison.Request{
-                 body: "body",
-                 headers: [],
-                 method: :post,
-                 options: [follow_redirect: true],
-                 params: %{},
-                 url: "http://localhost"
-               },
-               redirect_url: "https://localhost"
-             }
+  for loc_header <- ["Location", "location"] do
+    test "request returns MaybeRedirect when passing follow_redirect option and server sets #{
+           loc_header
+         } header" do
+      expect(:hackney, :request, fn :post,
+                                    "http://localhost",
+                                    [],
+                                    "body",
+                                    [follow_redirect: true] ->
+        # Mock a redirect from `http://localhost` to `https://localhost`
+        {:ok,
+         {:maybe_redirect, 302, _headers = [{unquote(loc_header), "https://localhost"}], :client}}
+      end)
+
+      assert HTTPoison.post!("localhost", "body", [], follow_redirect: true) ==
+               %HTTPoison.MaybeRedirect{
+                 status_code: 302,
+                 headers: [{unquote(loc_header), "https://localhost"}],
+                 request_url: "http://localhost",
+                 request: %HTTPoison.Request{
+                   body: "body",
+                   headers: [],
+                   method: :post,
+                   options: [follow_redirect: true],
+                   params: %{},
+                   url: "http://localhost"
+                 },
+                 redirect_url: "https://localhost"
+               }
+    end
   end
 
   test "passing max_redirect option" do