diff --git a/Dockerfile b/Dockerfile
index ea2353e..0938b7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG SYNAPSE_VERSION=1.104.0
+ARG SYNAPSE_VERSION=1.105.0rc1
 ARG PYTHON_VERSION=3.11
 ARG ALPINE_VERSION=3.18
 ARG HARDENED_MALLOC_VERSION=11