diff --git a/python/run_matching.py b/python/run_matching.py
index c16c330..7cf1ff8 100755
--- a/python/run_matching.py
+++ b/python/run_matching.py
@@ -18,7 +18,7 @@ from mwmatching import (maximum_weight_matching,
                         adjust_weights_for_maximum_cardinality_matching)
 
 
-def parse_int_or_float(s: str) -> int|float:
+def parse_int_or_float(s: str) -> float:
     """Convert a string to integer or float value."""
     try:
         return int(s)
@@ -27,7 +27,7 @@ def parse_int_or_float(s: str) -> int|float:
     return float(s)
 
 
-def read_dimacs_graph(f: TextIO) -> list[tuple[int, int, int|float]]:
+def read_dimacs_graph(f: TextIO) -> list[tuple[int, int, float]]:
     """Read a graph in DIMACS edge list format."""
 
     edges: list[tuple[int, int, float]] = []
@@ -70,7 +70,7 @@ def read_dimacs_graph(f: TextIO) -> list[tuple[int, int, int|float]]:
     return edges
 
 
-def read_dimacs_graph_file(filename: str) -> list[tuple[int, int, int|float]]:
+def read_dimacs_graph_file(filename: str) -> list[tuple[int, int, float]]:
     """Read a graph from file or stdin."""
     if filename:
         with open(filename, "r", encoding="ascii") as f:
@@ -87,11 +87,11 @@ def read_dimacs_graph_file(filename: str) -> list[tuple[int, int, int|float]]:
 
 def read_dimacs_matching(
         f: TextIO
-        ) -> tuple[int|float, list[tuple[int, int]]]:
+        ) -> tuple[float, list[tuple[int, int]]]:
     """Read a matching solution in DIMACS format."""
 
     have_weight = False
-    weight: int|float = 0
+    weight: float = 0
     pairs: list[tuple[int, int]] = []
 
     for line in f:
@@ -138,7 +138,7 @@ def read_dimacs_matching(
 
 def read_dimacs_matching_file(
         filename: str
-        ) -> tuple[int|float, list[tuple[int, int]]]:
+        ) -> tuple[float, list[tuple[int, int]]]:
     """Read a matching from file."""
     with open(filename, "r", encoding="ascii") as f:
         try:
@@ -149,7 +149,7 @@ def read_dimacs_matching_file(
 
 def write_dimacs_matching(
         f: TextIO,
-        weight: int|float,
+        weight: float,
         pairs: list[tuple[int, int]]
         ) -> None:
     """Write a matching solution in DIMACS format."""
@@ -165,7 +165,7 @@ def write_dimacs_matching(
 
 def write_dimacs_matching_file(
         filename: str,
-        weight: int|float,
+        weight: float,
         pairs: list[tuple[int, int]]
         ) -> None:
     """Write a matching to file or stdout."""
@@ -177,15 +177,15 @@ def write_dimacs_matching_file(
 
 
 def calc_matching_weight(
-        edges: list[tuple[int, int, int|float]],
+        edges: list[tuple[int, int, float]],
         pairs: list[tuple[int, int]]
-        ) -> int|float:
+        ) -> float:
     """Verify that the matching is valid and calculate its weight.
 
     Matched pairs are assumed to be in the same order as edges.
     """
 
-    weight: int|float = 0
+    weight: float = 0
 
     edge_pos = 0
     for pair in pairs:
@@ -267,7 +267,7 @@ def verify_matching(filename: str, maxcard: bool, wfactor: float) -> bool:
     edges = read_dimacs_graph_file(filename)
     (gold_weight, gold_pairs) = read_dimacs_matching_file(matching_filename)
 
-    edges_adj: Sequence[tuple[int, int, int|float]] = edges
+    edges_adj: Sequence[tuple[int, int, float]] = edges
 
     if wfactor != 1.0:
         if wfactor.is_integer():