diff --git a/requirements/requirements-ci.txt b/requirements/requirements-ci.txt
index 1e768c3bd4..8251e8423b 100644
--- a/requirements/requirements-ci.txt
+++ b/requirements/requirements-ci.txt
@@ -87,7 +87,7 @@ marshmallow-enum==1.5.1   # via -r requirements-dev.txt
 marshmallow-polyfield==5.8  # via -r requirements-dev.txt
 marshmallow==3.6.1        # via -r requirements-dev.txt, marshmallow-dataclass, marshmallow-enum, marshmallow-polyfield, webargs
 matrix-client==0.3.2      # via -r requirements-dev.txt
-matrix-synapse==1.10.1    # via -r requirements-dev.txt
+matrix-synapse==1.14.0    # via -r requirements-dev.txt
 mccabe==0.6.1             # via -r requirements-dev.txt, flake8, pylint
 mirakuru==2.1.2           # via -r requirements-dev.txt
 more-itertools==7.0.0     # via -r requirements-dev.txt, pytest
diff --git a/requirements/requirements-dev.in b/requirements/requirements-dev.in
index 6c2bbdee7b..1026a65b0e 100644
--- a/requirements/requirements-dev.in
+++ b/requirements/requirements-dev.in
@@ -42,4 +42,4 @@ coverage
 bump2version
 
 # Test support
-matrix-synapse<1.11
+matrix-synapse<1.15
diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index d3ed418a6c..0decd74943 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -85,7 +85,7 @@ marshmallow-enum==1.5.1   # via -r requirements.txt
 marshmallow-polyfield==5.8  # via -r requirements.txt
 marshmallow==3.6.1        # via -r requirements.txt, marshmallow-dataclass, marshmallow-enum, marshmallow-polyfield, webargs
 matrix-client==0.3.2      # via -r requirements.txt
-matrix-synapse==1.10.1    # via -r requirements-dev.in
+matrix-synapse==1.14.0    # via -r requirements-dev.in
 mccabe==0.6.1             # via flake8, pylint
 mirakuru==2.1.2           # via -r requirements.txt
 more-itertools==7.0.0     # via pytest