diff --git a/pkgs/development/python-modules/ihatemoney/default.nix b/pkgs/development/python-modules/ihatemoney/default.nix
index 5df5e6b18cd2..102ab10421cb 100644
--- a/pkgs/development/python-modules/ihatemoney/default.nix
+++ b/pkgs/development/python-modules/ihatemoney/default.nix
@@ -33,15 +33,22 @@
 
 buildPythonPackage rec {
   pname = "ihatemoney";
-  version = "4.1";
+  version = "4.1.4";
 
   src = fetchFromGitHub {
     owner = "spiral-project";
     repo = pname;
     rev = version;
-    sha256 = "1ai7v2i2rvswzv21nwyq51fvp8lr2x2cl3n34p11br06kc1pcmin";
+    sha256 = "1k9pgjvhvmr9wh15zrsxi14cg1fvj41lz2pq9lm03crlxv0frbcm";
   };
 
+  postPatch = ''
+    # remove patch release level pinning
+    sed -i 's/==\([0-9]*\.[0-9]*\).*"/~=\1"/' setup.py
+    # https://github.com/spiral-project/ihatemoney/issues/567
+    sed -i 's/WTForms~=2.2/WTForms>=2.1,<2.3/' setup.py
+  '';
+
   propagatedBuildInputs = [
     alembic
     aniso8601