diff --git a/requirements/requirements-ci.txt b/requirements/requirements-ci.txt
index e4a52e9e74..3c5b565d38 100644
--- a/requirements/requirements-ci.txt
+++ b/requirements/requirements-ci.txt
@@ -412,6 +412,10 @@ pathspec==0.8.0
     #   black
 pdbpp==0.10.2
     # via -r requirements-dev.txt
+pep517==0.10.0
+    # via
+    #   -r requirements-dev.txt
+    #   pip-tools
 pexpect==4.8.0
     # via
     #   -r requirements-dev.txt
@@ -428,7 +432,7 @@ pillow==8.1.1
     # via
     #   -r requirements-dev.txt
     #   matrix-synapse
-pip-tools==5.5.0
+pip-tools==6.0.1
     # via -r requirements-dev.txt
 pluggy==0.12.0
     # via
@@ -660,6 +664,7 @@ toml==0.10.2
     # via
     #   -r requirements-dev.txt
     #   black
+    #   pep517
     #   pylint
     #   pytest
 toolz==0.9.0
diff --git a/requirements/requirements-dev.in b/requirements/requirements-dev.in
index fe8039d91c..4428671623 100644
--- a/requirements/requirements-dev.in
+++ b/requirements/requirements-dev.in
@@ -9,7 +9,7 @@
 # -r requirements-docs.txt
 
 # Dependencies
-pip-tools~=5.5.0  # this is used by 'deps.py'
+pip-tools~=6.0.1  # this is used by 'deps.py'
 
 # Linting
 flake8
diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index 6d503993cc..df59b5ca12 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -360,6 +360,8 @@ pathspec==0.8.0
     # via black
 pdbpp==0.10.2
     # via -r requirements-dev.in
+pep517==0.10.0
+    # via pip-tools
 pexpect==4.8.0
     # via
     #   -r requirements-dev.in
@@ -370,7 +372,7 @@ pickleshare==0.7.5
     # via ipython
 pillow==8.1.1
     # via matrix-synapse
-pip-tools==5.5.0
+pip-tools==6.0.1
     # via -r requirements-dev.in
 pluggy==0.12.0
     # via pytest
@@ -555,6 +557,7 @@ toml==0.10.2
     # via
     #   -r requirements.txt
     #   black
+    #   pep517
     #   pylint
     #   pytest
 toolz==0.9.0