diff --git a/pkgs/development/beam-modules/ex_doc/default.nix b/pkgs/development/beam-modules/ex_doc/default.nix
index 0c7ed7bb9daa..939335e9593d 100644
--- a/pkgs/development/beam-modules/ex_doc/default.nix
+++ b/pkgs/development/beam-modules/ex_doc/default.nix
@@ -14,12 +14,12 @@
 
 let
   pname = "ex_doc";
-  version = "0.39.3";
+  version = "0.40.0";
   src = fetchFromGitHub {
     owner = "elixir-lang";
     repo = "${pname}";
     rev = "v${version}";
-    hash = "sha256-LLy4gemj3oiMbZKc9ZUWY3g2fyY1Rvxjtzx/sbAp8JE=";
+    hash = "sha256-jz/9zIylMe7opCLt9wQ4GhR7bvAenWU8MOEACIvLKzk=";
   };
 in
 mixRelease {
@@ -37,7 +37,7 @@ mixRelease {
   mixFodDeps = fetchMixDeps {
     pname = "mix-deps-${pname}";
     inherit src version elixir;
-    hash = "sha256-TknrENa0Nb1Eobd4oTBl6TilPVEsw9+XjPdF3Ntq+DI=";
+    hash = "sha256-pMIm0lVMqkuiprp0XeVB+x4VTh+hQR3t8dk5OBmnIqA=";
   };
 
   passthru = {