diff --git a/requirements/requirements-ci.txt b/requirements/requirements-ci.txt
index 3f2a0d935a..5451a734a5 100644
--- a/requirements/requirements-ci.txt
+++ b/requirements/requirements-ci.txt
@@ -303,6 +303,10 @@ idna==2.8
     #   requests
     #   twisted
     #   yarl
+ijson==3.1.4
+    # via
+    #   -r requirements-dev.txt
+    #   matrix-synapse
 importlib-metadata==4.0.1
     # via
     #   -r requirements-dev.txt
@@ -380,7 +384,7 @@ matplotlib-inline==0.1.2
     #   ipython
 matrix-client==0.3.2
     # via -r requirements-dev.txt
-matrix-synapse==1.33.0
+matrix-synapse==1.41.0
     # via -r requirements-dev.txt
 mccabe==0.6.1
     # via
diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index c6d7e7ebbf..a0561287d0 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -274,6 +274,8 @@ idna==2.8
     #   requests
     #   twisted
     #   yarl
+ijson==3.1.4
+    # via matrix-synapse
 importlib-metadata==4.0.1
     # via pluggy
 incremental==17.5.0
@@ -336,7 +338,7 @@ matplotlib-inline==0.1.2
     # via ipython
 matrix-client==0.3.2
     # via -r requirements.txt
-matrix-synapse==1.33.0
+matrix-synapse==1.41.0
     # via -r requirements-dev.in
 mccabe==0.6.1
     # via