diff --git a/.github/workflows/typecheck.yml b/.github/workflows/typecheck.yml
index 122a678..b623f8c 100644
--- a/.github/workflows/typecheck.yml
+++ b/.github/workflows/typecheck.yml
@@ -29,6 +29,4 @@ jobs:
           python -m pip install --upgrade pip
           pip install .[dev]
 
-      - run: mypy
-
-      - run: pyright
+      - run: mypy
\ No newline at end of file
diff --git a/README.md b/README.md
index e5fd030..b5f331d 100644
--- a/README.md
+++ b/README.md
@@ -53,8 +53,9 @@ circuit = parser.parse_file("my_circuit.qasm")
 |------------------------------------------------------------------|---------------------|
 | [ccx](https://openqasm.com/language/standard_library.html#ccx)   | CCX                 |
 | [crz](https://openqasm.com/language/standard_library.html#crz)   | RZZ                 |
-| [cx](https://openqasm.com/language/standard_library.html#cx)     | CX                  |
+| [cx](https://openqasm.com/language/standard_library.html#cx)     | CNOT                |
 | [swap](https://openqasm.com/language/standard_library.html#swap) | SWAP                |
+| [swap](https://openqasm.com/language/standard_library.html#cz)   | CZ                  |
 | [h](https://openqasm.com/language/standard_library.html#h)       | H                   |
 | [s](https://openqasm.com/language/standard_library.html#s)       | S                   |
 | [x](https://openqasm.com/language/standard_library.html#x)       | X                   |
diff --git a/graphix_qasm_parser/parser.py b/graphix_qasm_parser/parser.py
index 16e1953..11cdbcf 100644
--- a/graphix_qasm_parser/parser.py
+++ b/graphix_qasm_parser/parser.py
@@ -45,10 +45,12 @@ def CZ(_q0: int, _q1: int) -> None:  # noqa: N802
             raise NotImplementedError(msg)
 
     try:
-        from graphix.fundamentals import rad_to_angle
+        from graphix.fundamentals import ANGLE_PI, rad_to_angle
     except ImportError:
         # Compatibility with graphix <= 0.3.3
         # See https://github.com/TeamGraphix/graphix/pull/399
+        ANGLE_PI = math.pi
+
         def rad_to_angle(angle: float) -> float:
             """In older versions of graphix (<= 0.3.3), instruction angles were expressed in radians."""
             return angle
@@ -472,7 +474,8 @@ def visitLiteralExpression(self, ctx: qasm3Parser.LiteralExpressionContext) -> _
         raise NotImplementedError(msg)
 
     def parse_binary_operator(
-        self, ctx: qasm3Parser.AdditiveExpressionContext | qasm3Parser.MultiplicativeExpressionContext
+        self,
+        ctx: qasm3Parser.AdditiveExpressionContext | qasm3Parser.MultiplicativeExpressionContext,
     ) -> _Value:
         lhs_expr: qasm3Parser.ExpressionContext = ctx.getChild(0)
         rhs_expr: qasm3Parser.ExpressionContext = ctx.getChild(2)