diff --git a/requirements-dev.txt b/requirements-dev.txt
index 119b73ec..303bb50c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,14 +6,14 @@
 #
 appdirs==1.4.4            # via black
 attrs==21.2.0             # via black, pytest
-black==21.8b0            # via -r requirements-dev.in
+black==21.9b0            # via -r requirements-dev.in
 click==8.0.1              # via black
 coverage==5.5           # via -r requirements-dev.in
 entrypoints==0.3          # via flake8
 flake8==3.9.2             # via -r requirements-dev.in
 isort[pyproject]==5.9.3  # via -r requirements-dev.in
 mccabe==0.6.1             # via flake8
-more-itertools==8.9.0     # via pytest
+more-itertools==8.10.0     # via pytest
 mypy-extensions==0.4.3    # via mypy
 mypy==0.910               # via -r requirements-dev.in
 packaging==21.0           # via pytest
diff --git a/requirements.txt b/requirements.txt
index 4f3b63fd..af560362 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 #
 appdirs==1.4.4            # via fs
 attrs==21.2.0             # via ufoLib2 (setup.py)
-fonttools[ufo]==4.26.2     # via ufoLib2 (setup.py)
+fonttools[ufo]==4.27.0     # via ufoLib2 (setup.py)
 fs==2.4.13                # via fonttools
 pytz==2021.1              # via fs
 six==1.16.0               # via fs