diff --git a/.mypy.ini b/.mypy.ini
index e3dd5e8d6..7f25043d7 100644
--- a/.mypy.ini
+++ b/.mypy.ini
@@ -11,7 +11,7 @@ warn_unused_ignores = True
 disallow_untyped_defs = True
 
 # 3rd-party libs without type hints nor stubs
-[mypy-matplotlib.*,scipy.*,qutip.*,jsonschema.*,py.*]
+[mypy-matplotlib.*,scipy.*,qutip.*,jsonschema.*,py.*, referencing.*]
 follow_imports = silent
 ignore_missing_imports = True
 
diff --git a/dev_requirements.txt b/dev_requirements.txt
index ad9e69fe4..37188585f 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -4,7 +4,6 @@ flake8
 flake8-docstrings
 isort
 mypy == 1.2
-pydantic <= 2.5.0
 pytest
 pytest-cov