diff --git a/requirements.txt b/requirements.txt
index fac9e0e9f..5861e458e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,19 @@
 # we use the official Brotli module on CPython and the CFFI-based
 # extension 'brotlipy' on PyPy
-brotli==1.0.9; platform_python_implementation != "PyPy"
-brotlicffi==1.0.9.2; platform_python_implementation == "PyPy"
+brotli==1.1.0; platform_python_implementation != "PyPy"
+brotlicffi==1.1.0.0; platform_python_implementation == "PyPy"
 unicodedata2==15.0.0; python_version <= '3.11'
 scipy==1.10.0; platform_python_implementation != "PyPy" and python_version <= '3.8'
-scipy==1.11.2; platform_python_implementation != "PyPy" and python_version >= '3.9'
+scipy==1.11.3; platform_python_implementation != "PyPy" and python_version >= '3.9'
 munkres==1.1.4; platform_python_implementation == "PyPy"
-zopfli==0.2.1
+zopfli==0.2.3
 fs==2.4.16
-skia-pathops==0.7.3; platform_python_implementation != "PyPy"
+skia-pathops==0.8.0.post1; platform_python_implementation != "PyPy"
 # this is only required to run Tests/cu2qu/{ufo,cli}_test.py
-ufoLib2==0.14.0
-ufo2ft==2.31.0
-pyobjc==9.0; sys_platform == "darwin"
-freetype-py==2.3.0
-uharfbuzz==0.32.0
-glyphsLib==6.2.1 # this is only required to run Tests/varLib/interpolatable_test.py
-lxml==4.9.2
+ufoLib2==0.16.0
+ufo2ft==2.33.4
+pyobjc==10.0; sys_platform == "darwin"
+freetype-py==2.4.0
+uharfbuzz==0.37.3
+glyphsLib==6.4.0 # this is only required to run Tests/varLib/interpolatable_test.py
+lxml==4.9.3