Index: pyo3-async-runtimes/Cargo.toml
===================================================================
--- pyo3-async-runtimes.orig/Cargo.toml
+++ pyo3-async-runtimes/Cargo.toml
@@ -229,10 +229,10 @@ version = "1.14"
 version = "0.2"
 
 [dependencies.pyo3]
-version = "0.28"
+version = ">=0.27,<0.29"
 
 [dependencies.pyo3-async-runtimes-macros]
-version = "=0.28.0"
+version = ">=0.27,<0.29"
 optional = true
 
 [dependencies.tokio]
@@ -245,5 +245,5 @@ features = [
 optional = true
 
 [dev-dependencies.pyo3]
-version = "0.28"
+version = ">=0.27,<0.29"
 features = ["macros"]
