diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 23d197fa3..9709e08bf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -378,7 +378,7 @@ jobs:
       # tests need a synapse: this is a service and not michaelkaye/setup-matrix-synapse@main as the
       # latter does not provide networking for services to communicate with it.
       synapse:
-        image: ghcr.io/matrix-org/synapse-service:v1.72.0 # keep in sync with ./coverage.yml
+        image: ghcr.io/matrix-org/synapse-service:v1.94.0 # keep in sync with ./coverage.yml
         env:
             SYNAPSE_COMPLEMENT_DATABASE: sqlite
             SERVER_NAME: synapse
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 5ee5a9e2c..878683989 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -59,7 +59,7 @@ jobs:
       # tests need a synapse: this is a service and not michaelkaye/setup-matrix-synapse@main as the
       # latter does not provide networking for services to communicate with it.
       synapse:
-        image: ghcr.io/matrix-org/synapse-service:v1.72.0 # keep in sync with ./ci.yml
+        image: ghcr.io/matrix-org/synapse-service:v1.94.0 # keep in sync with ./ci.yml
         env:
             SYNAPSE_COMPLEMENT_DATABASE: sqlite
             SERVER_NAME: synapse