diff --git a/packaging/build_conda.sh b/packaging/build_conda.sh
index 47b428e773..b75bbf8a13 100755
--- a/packaging/build_conda.sh
+++ b/packaging/build_conda.sh
@@ -6,7 +6,7 @@ script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 export BUILD_TYPE="conda"
 export NO_CUDA_PACKAGE=1
-setup_env 0.4.0
+setup_env 0.5.0
 export SOURCE_ROOT_DIR="$PWD"
 setup_conda_pytorch_constraint
 conda build $CONDA_CHANNEL_FLAGS --no-anaconda-upload --python "$PYTHON_VERSION" packaging/torchaudio
diff --git a/packaging/build_wheel.sh b/packaging/build_wheel.sh
index 00def0928e..1e4f927ef5 100755
--- a/packaging/build_wheel.sh
+++ b/packaging/build_wheel.sh
@@ -6,7 +6,7 @@ script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 export BUILD_TYPE="wheel"
 export NO_CUDA_PACKAGE=1
-setup_env 0.4.0
+setup_env 0.5.0
 setup_wheel_python
 "$script_dir/build_from_source.sh" "$(pwd)"  # Build static dependencies
 pip_install numpy future
diff --git a/setup.py b/setup.py
index e318910645..8382c1114c 100644
--- a/setup.py
+++ b/setup.py
@@ -55,7 +55,7 @@ def check_env_flag(name, default=''):
 
 # Creating the version file
 cwd = os.path.dirname(os.path.abspath(__file__))
-version = '0.4.0a0'
+version = '0.5.0a0'
 sha = 'Unknown'
 
 try: