diff --git a/requirements-dev.txt b/requirements-dev.txt
index be033f9..6ea200e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,6 @@
 pytest==7.1.2
 skia-python==87.4
-numpy==1.23.0  # undeclared dependency of skia-python
+numpy==1.23.1  # undeclared dependency of skia-python
 pycairo==1.21.0; sys_platform != 'darwin'  # there are currently no Mac wheels for pycairo
 pyobjc==8.5; sys_platform == 'darwin'
 pillow==9.2.0
diff --git a/requirements.txt b/requirements.txt
index 28ef793..a7dc67d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-fonttools==4.34.0
-uharfbuzz==0.27.0
+fonttools==4.34.4
+uharfbuzz==0.30.0