diff --git a/exporter/opentelemetry-exporter-prometheus/CHANGELOG.md b/exporter/opentelemetry-exporter-prometheus/CHANGELOG.md
index 618e2c414..62cd9d3ae 100644
--- a/exporter/opentelemetry-exporter-prometheus/CHANGELOG.md
+++ b/exporter/opentelemetry-exporter-prometheus/CHANGELOG.md
@@ -2,10 +2,6 @@
 
 ## Unreleased
 
-## Version 0.13b0
-
-Released 2020-09-17
-
 - Drop support for Python 3.4
   ([#1099](https://github.com/open-telemetry/opentelemetry-python/pull/1099))
 
diff --git a/exporter/opentelemetry-exporter-prometheus/setup.cfg b/exporter/opentelemetry-exporter-prometheus/setup.cfg
index b806c8079..5d35fb64e 100644
--- a/exporter/opentelemetry-exporter-prometheus/setup.cfg
+++ b/exporter/opentelemetry-exporter-prometheus/setup.cfg
@@ -40,8 +40,8 @@ package_dir=
 packages=find_namespace:
 install_requires =
     prometheus_client >= 0.5.0, < 1.0.0
-    opentelemetry-api == 0.13b0
-    opentelemetry-sdk == 0.13b0
+    opentelemetry-api == 0.13dev0
+    opentelemetry-sdk == 0.13dev0
 
 [options.packages.find]
 where = src
diff --git a/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/version.py b/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/version.py
index 2015e87c7..9cc445d09 100644
--- a/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/version.py
+++ b/exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.13b0"
+__version__ = "0.13dev0"