diff --git a/Cargo.toml b/Cargo.toml
index d47b2908..b1df5af7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,12 +15,12 @@ exclude = ["fuzz/"]
 crate-type = ["cdylib", "rlib"]
 
 [build-dependencies]
-pyo3-build-config = "0.19.0"
+pyo3-build-config = "0.20.0"
 
 [dependencies]
 libc = "0.2.104"
 log = {version = "0.4.17", optional = true }
-pyo3 = {version = "0.19.0", features=["extension-module", "abi3-py37"], optional = true }
+pyo3 = {version = "0.20.0", features=["extension-module", "abi3-py37"], optional = true }
 
 # Common test/bench dependencies
 [dev-dependencies]