diff --git a/Dockerfile b/Dockerfile
index cf8b251..1c9df22 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
-ARG SYNAPSE_VERSION=1.104.0
+ARG SYNAPSE_VERSION=1.105.0rc1
 ARG PYTHON_VERSION=3.11
 ARG HARDENED_MALLOC_VERSION=11
 ARG UID=991