diff --git a/pyproject.toml b/pyproject.toml
index a996844..fb2c18c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dev = [
     "fastapi>=0.118.0,<1.0.0", # for compatibility testing
     "anyio>=4.11.0,<5.0.0",
     "httpx>=0.28.1,<0.29.0",
-    "trio>=0.31.0,<0.32.0",
+    "trio>=0.31.0,<0.33.0",
 ]
 
 [tool.ruff]