diff --git a/pkgs/development/python-modules/apischema/default.nix b/pkgs/development/python-modules/apischema/default.nix
index 632489d7cce9..c750c20ab516 100644
--- a/pkgs/development/python-modules/apischema/default.nix
+++ b/pkgs/development/python-modules/apischema/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "apischema";
-  version = "0.18.1";
+  version = "0.18.3";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "wyfo";
     repo = "apischema";
     rev = "refs/tags/v${version}";
-    hash = "sha256-omw6znk09r2SigPfaVrtA6dd8KeSfjaPgGfK12ty23g=";
+    hash = "sha256-YFJbNxCwDrJb603Bf8PDrvhVt4T53PNWOYs716c0f1I=";
   };
 
   optional-dependencies = {