diff --git a/make/ex_doc.exs b/make/ex_doc.exs
index 3800cbdd6404..3929dc9b51e6 100644
--- a/make/ex_doc.exs
+++ b/make/ex_doc.exs
@@ -290,7 +290,8 @@ config =
 
       _ ->
         ""
-    end
+    end,
+    formatters: ["html", "epub"]
   ] ++ search_config
 
 Keyword.merge(
diff --git a/make/ex_doc.sha1sum b/make/ex_doc.sha1sum
index 8a9e279785b8..bf1c9579e967 100644
--- a/make/ex_doc.sha1sum
+++ b/make/ex_doc.sha1sum
@@ -1 +1 @@
-d8ab8b250273a73a1626dc32257da6120bb38c6c  ../bin/ex_doc
+d097a474ac0254dc4ca29574fd932c37d089167f  ../bin/ex_doc
diff --git a/make/ex_doc.sha256sum b/make/ex_doc.sha256sum
index 7914c2a80cd4..cda017ce073e 100644
--- a/make/ex_doc.sha256sum
+++ b/make/ex_doc.sha256sum
@@ -1 +1 @@
-bc16c8eaae26886f15a2d2cff490f3c873d425106e949eb5fe0e8377e778c93d  ../bin/ex_doc
+1addd95c8b3679580ec9f368c973955e6cf7b4456a30f2ec0f68e51982913495  ../bin/ex_doc
diff --git a/make/ex_doc_link b/make/ex_doc_link
index df743c443fc9..db7cb677f6e9 100644
--- a/make/ex_doc_link
+++ b/make/ex_doc_link
@@ -1 +1 @@
-https://github.com/elixir-lang/ex_doc/releases/download/v0.39.3/ex_doc_otp_27
+https://github.com/elixir-lang/ex_doc/releases/download/v0.40.1/ex_doc_otp_27
diff --git a/make/ex_doc_vsn b/make/ex_doc_vsn
index d770dceb02b6..01437515a7c3 100644
--- a/make/ex_doc_vsn
+++ b/make/ex_doc_vsn
@@ -1 +1 @@
-v0.39.3
+v0.40.1