diff --git a/opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/version.py b/opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/version.py
index 439b327c..fbdd7633 100644
--- a/opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/version.py
+++ b/opentelemetry-exporter-gcp-monitoring/src/opentelemetry/exporter/cloud_monitoring/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.5.0a0"
+__version__ = "1.6.0.dev0"
diff --git a/opentelemetry-exporter-gcp-trace/src/opentelemetry/exporter/cloud_trace/version.py b/opentelemetry-exporter-gcp-trace/src/opentelemetry/exporter/cloud_trace/version.py
index 2342a4a0..1f86e73c 100644
--- a/opentelemetry-exporter-gcp-trace/src/opentelemetry/exporter/cloud_trace/version.py
+++ b/opentelemetry-exporter-gcp-trace/src/opentelemetry/exporter/cloud_trace/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.5.0"
+__version__ = "1.6.0.dev0"
diff --git a/opentelemetry-propagator-gcp/src/opentelemetry/propagators/cloud_trace_propagator/version.py b/opentelemetry-propagator-gcp/src/opentelemetry/propagators/cloud_trace_propagator/version.py
index 7fbecf3c..fbdd7633 100644
--- a/opentelemetry-propagator-gcp/src/opentelemetry/propagators/cloud_trace_propagator/version.py
+++ b/opentelemetry-propagator-gcp/src/opentelemetry/propagators/cloud_trace_propagator/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.5.0"
+__version__ = "1.6.0.dev0"
diff --git a/opentelemetry-resourcedetector-gcp/src/opentelemetry/resourcedetector/gcp_resource_detector/version.py b/opentelemetry-resourcedetector-gcp/src/opentelemetry/resourcedetector/gcp_resource_detector/version.py
index 439b327c..fbdd7633 100644
--- a/opentelemetry-resourcedetector-gcp/src/opentelemetry/resourcedetector/gcp_resource_detector/version.py
+++ b/opentelemetry-resourcedetector-gcp/src/opentelemetry/resourcedetector/gcp_resource_detector/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.5.0a0"
+__version__ = "1.6.0.dev0"