diff --git a/requirements/requirements-ci.txt b/requirements/requirements-ci.txt
index cbf70a19e9..eaa9a3ebaa 100644
--- a/requirements/requirements-ci.txt
+++ b/requirements/requirements-ci.txt
@@ -431,6 +431,10 @@ 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
@@ -447,7 +451,7 @@ 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
@@ -745,6 +749,7 @@ 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 cc2fec1dd6..81349ad189 100644
--- a/requirements/requirements-dev.in
+++ b/requirements/requirements-dev.in
@@ -7,7 +7,7 @@
 -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 0be785eddb..b12d997d50 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -386,6 +386,8 @@ 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
@@ -396,7 +398,7 @@ 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
@@ -652,6 +654,7 @@ toml==0.10.2
     # via
     #   -r requirements.txt
     #   black
+    #   pep517
     #   pylint
     #   pytest
 toolz==0.9.0