diff --git a/bindings/python/pymongocrypt/version.py b/bindings/python/pymongocrypt/version.py
index f87f652fb..b15a76bfd 100644
--- a/bindings/python/pymongocrypt/version.py
+++ b/bindings/python/pymongocrypt/version.py
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = '1.6.0'
+__version__ = '1.6.1.dev0'
 
 _MIN_LIBMONGOCRYPT_VERSION = '1.8.0'