diff --git a/Cargo.toml b/Cargo.toml
index af858422..80b76c27 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3"
-version = "0.3.0"
+version = "0.3.1"
 description = "Bindings to Python interpreter"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 readme = "README.md"
@@ -23,7 +23,7 @@ log = "0.4"
 libc = "0.2"
 spin = "0.4.6"
 num-traits = "0.2"
-pyo3cls = { path = "pyo3cls", version = "0.3.0" }
+pyo3cls = { path = "pyo3cls", version = "0.3.1" }
 
 [dev-dependencies]
 docmatic = "^0.1.2"
diff --git a/pyo3-derive-backend/Cargo.toml b/pyo3-derive-backend/Cargo.toml
index 212af3b2..8c905b06 100644
--- a/pyo3-derive-backend/Cargo.toml
+++ b/pyo3-derive-backend/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3-derive-backend"
-version = "0.3.0"
+version = "0.3.1"
 description = "Code generation for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]
diff --git a/pyo3cls/Cargo.toml b/pyo3cls/Cargo.toml
index ed0491e4..e88af8bb 100644
--- a/pyo3cls/Cargo.toml
+++ b/pyo3cls/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3cls"
-version = "0.3.0"
+version = "0.3.1"
 description = "Proc macros for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]
@@ -22,7 +22,7 @@ features=["full", "parsing", "printing", "extra-traits"]
 
 [dependencies.pyo3-derive-backend]
 path = "../pyo3-derive-backend"
-version = "0.3.0"
+version = "0.3.1"
 
 [dependencies.proc-macro2]
 version = "0.4"