diff --git a/examples/opentelemetry-example-app/setup.py b/examples/opentelemetry-example-app/setup.py
index 0e577cd2649..ae614aee33c 100644
--- a/examples/opentelemetry-example-app/setup.py
+++ b/examples/opentelemetry-example-app/setup.py
@@ -16,7 +16,7 @@
 
 setuptools.setup(
     name="opentelemetry-example-app",
-    version="0.3.dev0",
+    version="0.4.dev0",
     author="OpenTelemetry Authors",
     author_email="cncf-opentelemetry-contributors@lists.cncf.io",
     classifiers=[
diff --git a/ext/opentelemetry-ext-flask/CHANGELOG.md b/ext/opentelemetry-ext-flask/CHANGELOG.md
new file mode 100644
index 00000000000..d4df57eefc6
--- /dev/null
+++ b/ext/opentelemetry-ext-flask/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3a0
+
+Released 2019-12-11
+
+- Initial release
diff --git a/ext/opentelemetry-ext-flask/src/opentelemetry/ext/flask/version.py b/ext/opentelemetry-ext-flask/src/opentelemetry/ext/flask/version.py
index ed56d30324d..2f792fff802 100644
--- a/ext/opentelemetry-ext-flask/src/opentelemetry/ext/flask/version.py
+++ b/ext/opentelemetry-ext-flask/src/opentelemetry/ext/flask/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-http-requests/CHANGELOG.md b/ext/opentelemetry-ext-http-requests/CHANGELOG.md
index ac7fc896a3b..0e9be6e475a 100644
--- a/ext/opentelemetry-ext-http-requests/CHANGELOG.md
+++ b/ext/opentelemetry-ext-http-requests/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 0.3a0
+
+Released 2019-10-29
+
 ## 0.2a0
 
 Released 2019-10-29
diff --git a/ext/opentelemetry-ext-http-requests/setup.cfg b/ext/opentelemetry-ext-http-requests/setup.cfg
index ceb5c137754..bb3f50c4808 100644
--- a/ext/opentelemetry-ext-http-requests/setup.cfg
+++ b/ext/opentelemetry-ext-http-requests/setup.cfg
@@ -39,7 +39,7 @@ package_dir=
     =src
 packages=find_namespace:
 install_requires =
-    opentelemetry-api >= 0.3.dev0
+    opentelemetry-api >= 0.4.dev0
     requests ~= 2.0
 
 [options.packages.find]
diff --git a/ext/opentelemetry-ext-http-requests/src/opentelemetry/ext/http_requests/version.py b/ext/opentelemetry-ext-http-requests/src/opentelemetry/ext/http_requests/version.py
index 93ef792d051..2f792fff802 100644
--- a/ext/opentelemetry-ext-http-requests/src/opentelemetry/ext/http_requests/version.py
+++ b/ext/opentelemetry-ext-http-requests/src/opentelemetry/ext/http_requests/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-jaeger/CHANGELOG.md b/ext/opentelemetry-ext-jaeger/CHANGELOG.md
index f059e90f5a0..05ffbffe0f6 100644
--- a/ext/opentelemetry-ext-jaeger/CHANGELOG.md
+++ b/ext/opentelemetry-ext-jaeger/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 0.3a0
+
+Released 2019-12-11
+
 ## 0.2a0
 
 Released 2019-10-29
diff --git a/ext/opentelemetry-ext-jaeger/src/opentelemetry/ext/jaeger/version.py b/ext/opentelemetry-ext-jaeger/src/opentelemetry/ext/jaeger/version.py
index 1f3a27dc85e..39a7c8a016d 100644
--- a/ext/opentelemetry-ext-jaeger/src/opentelemetry/ext/jaeger/version.py
+++ b/ext/opentelemetry-ext-jaeger/src/opentelemetry/ext/jaeger/version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-opentracing-shim/CHANGELOG.md b/ext/opentelemetry-ext-opentracing-shim/CHANGELOG.md
index 8fe7c21469b..af8ddc4ae88 100644
--- a/ext/opentelemetry-ext-opentracing-shim/CHANGELOG.md
+++ b/ext/opentelemetry-ext-opentracing-shim/CHANGELOG.md
@@ -2,7 +2,12 @@
 
 ## Unreleased
 
-- Implement extract and inject support for HTTP_HEADERS and TEXT_MAP formats.
+## 0.3a0
+
+Released 2019-12-11
+
+- Implement extract and inject support for HTTP_HEADERS and TEXT_MAP formats
+  ([#256](https://github.com/open-telemetry/opentelemetry-python/pull/256))
 
 ## 0.2a0
 
diff --git a/ext/opentelemetry-ext-opentracing-shim/src/opentelemetry/ext/opentracing_shim/version.py b/ext/opentelemetry-ext-opentracing-shim/src/opentelemetry/ext/opentracing_shim/version.py
index 93ef792d051..2f792fff802 100644
--- a/ext/opentelemetry-ext-opentracing-shim/src/opentelemetry/ext/opentracing_shim/version.py
+++ b/ext/opentelemetry-ext-opentracing-shim/src/opentelemetry/ext/opentracing_shim/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-pymongo/CHANGELOG.md b/ext/opentelemetry-ext-pymongo/CHANGELOG.md
new file mode 100644
index 00000000000..d4df57eefc6
--- /dev/null
+++ b/ext/opentelemetry-ext-pymongo/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3a0
+
+Released 2019-12-11
+
+- Initial release
diff --git a/ext/opentelemetry-ext-pymongo/setup.cfg b/ext/opentelemetry-ext-pymongo/setup.cfg
index f9362c75b35..ecc0ce3b778 100644
--- a/ext/opentelemetry-ext-pymongo/setup.cfg
+++ b/ext/opentelemetry-ext-pymongo/setup.cfg
@@ -39,7 +39,7 @@ package_dir=
     =src
 packages=find_namespace:
 install_requires =
-    opentelemetry-api >= 0.3.dev0
+    opentelemetry-api >= 0.4.dev0
     pymongo ~= 3.1
 
 [options.packages.find]
diff --git a/ext/opentelemetry-ext-pymongo/src/opentelemetry/ext/pymongo/version.py b/ext/opentelemetry-ext-pymongo/src/opentelemetry/ext/pymongo/version.py
index 93ef792d051..2f792fff802 100644
--- a/ext/opentelemetry-ext-pymongo/src/opentelemetry/ext/pymongo/version.py
+++ b/ext/opentelemetry-ext-pymongo/src/opentelemetry/ext/pymongo/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-testutil/src/opentelemetry/ext/testutil/version.py b/ext/opentelemetry-ext-testutil/src/opentelemetry/ext/testutil/version.py
index 70ddecedf86..116884f3557 100644
--- a/ext/opentelemetry-ext-testutil/src/opentelemetry/ext/testutil/version.py
+++ b/ext/opentelemetry-ext-testutil/src/opentelemetry/ext/testutil/version.py
@@ -1 +1 @@
-__version__ = "0.3dev0"
+__version__ = "0.4.dev0"
diff --git a/ext/opentelemetry-ext-wsgi/CHANGELOG.md b/ext/opentelemetry-ext-wsgi/CHANGELOG.md
index ac7fc896a3b..62d8a5baf0f 100644
--- a/ext/opentelemetry-ext-wsgi/CHANGELOG.md
+++ b/ext/opentelemetry-ext-wsgi/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+## 0.3a0
+
+Released 2019-12-11
+
+- Support new semantic conventions
+  ([#299](https://github.com/open-telemetry/opentelemetry-python/pull/299))
+- Updates for core library changes
+
 ## 0.2a0
 
 Released 2019-10-29
diff --git a/ext/opentelemetry-ext-wsgi/src/opentelemetry/ext/wsgi/version.py b/ext/opentelemetry-ext-wsgi/src/opentelemetry/ext/wsgi/version.py
index 93ef792d051..2f792fff802 100644
--- a/ext/opentelemetry-ext-wsgi/src/opentelemetry/ext/wsgi/version.py
+++ b/ext/opentelemetry-ext-wsgi/src/opentelemetry/ext/wsgi/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/opentelemetry-api/CHANGELOG.md b/opentelemetry-api/CHANGELOG.md
index ff78c0bf1ee..dc5ccc3ace2 100644
--- a/opentelemetry-api/CHANGELOG.md
+++ b/opentelemetry-api/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 ## Unreleased
 
+## 0.3a0
+
+Released 2019-12-11
+
+- Multiple tracing API changes
+- Multiple metrics API changes
+- Remove option to create unstarted spans from API
+  ([#290](https://github.com/open-telemetry/opentelemetry-python/pull/290))
+
 ## 0.2a0
 
 Released 2019-10-29
diff --git a/opentelemetry-api/src/opentelemetry/util/version.py b/opentelemetry-api/src/opentelemetry/util/version.py
index 93ef792d051..2f792fff802 100644
--- a/opentelemetry-api/src/opentelemetry/util/version.py
+++ b/opentelemetry-api/src/opentelemetry/util/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"
diff --git a/opentelemetry-sdk/CHANGELOG.md b/opentelemetry-sdk/CHANGELOG.md
index 8ddb3e60ef3..d981045858e 100644
--- a/opentelemetry-sdk/CHANGELOG.md
+++ b/opentelemetry-sdk/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 ## Unreleased
 
+## 0.3a0
+
+Released 2019-12-11
+
+- Multiple tracing SDK changes
+- Multiple metrics SDK changes
+- Add metrics exporters
+  ([#192](https://github.com/open-telemetry/opentelemetry-python/pull/192))
+- Multiple bugfixes and improvements
+
 ## 0.2a0
 
 Released 2019-10-29
diff --git a/opentelemetry-sdk/setup.py b/opentelemetry-sdk/setup.py
index f93b4b0f102..cbfb0f075d4 100644
--- a/opentelemetry-sdk/setup.py
+++ b/opentelemetry-sdk/setup.py
@@ -44,7 +44,7 @@
     include_package_data=True,
     long_description=open("README.rst").read(),
     long_description_content_type="text/x-rst",
-    install_requires=["opentelemetry-api==0.3.dev0"],
+    install_requires=["opentelemetry-api==0.4.dev0"],
     extras_require={},
     license="Apache-2.0",
     package_dir={"": "src"},
diff --git a/opentelemetry-sdk/src/opentelemetry/sdk/version.py b/opentelemetry-sdk/src/opentelemetry/sdk/version.py
index 93ef792d051..2f792fff802 100644
--- a/opentelemetry-sdk/src/opentelemetry/sdk/version.py
+++ b/opentelemetry-sdk/src/opentelemetry/sdk/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.dev0"
+__version__ = "0.4.dev0"