diff --git a/pycare/Cargo.toml b/pycare/Cargo.toml
index 56eb0a9..7248649 100644
--- a/pycare/Cargo.toml
+++ b/pycare/Cargo.toml
@@ -9,5 +9,5 @@ name = "caring"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = "0.21"
+pyo3 = { version = "0.21", features = ["abi3-py37"]}
 wecare = { path = "../wecare" }