diff --git a/requirements.txt b/requirements.txt
index b921d076..883a08b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,24 +1,24 @@
-afdko==3.9.1
+afdko==4.0.0
 appdirs==1.4.4
-attrs==21.4.0
-black==22.6.0
+attrs==23.1.0
+black==23.9.1
 booleanOperations==0.9.0
 Brotli==1.0.9
 click==8.1.3
-cu2qu==1.6.7.post1
-defcon==0.10.2
-fontMath==0.9.2
-fontParts==0.10.7
+cu2qu==1.6.7.post2
+defcon==0.10.3
+fontMath==0.9.3
+fontParts==0.11.0
 fontPens==0.2.4
-fonttools==4.34.4
+fonttools==4.43.0
 fs==2.4.16
 lxml==4.9.3
 MutatorMath==3.0.1
 pathspec>=0.9.0
-Pillow==9.2.0
+Pillow==10.0.1
 psautohint>=2.4.0
-pyclipper==1.3.0.post3
-pytz==2022.1
+pyclipper==1.3.0.post4
+pytz==2023.3
 regex==2023.10.3
 scour==0.38.2
 six==1.16.0
@@ -26,5 +26,5 @@ toml==0.10.2
 typed-ast>=1.4.2
 ufonormalizer==0.6.1
 ufoProcessor==1.9.0
-unicodedata2==14.0.0
+unicodedata2==15.0.0
 zopfli==0.2.2