diff --git a/pyproject.toml b/pyproject.toml
index ac6735593..d5970617a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,2 @@
 [build-system]
-requires = ["setuptools", "wheel", "numpy<1.22", "cython"]
+requires = ["setuptools", "wheel", "numpy", "cython"]
diff --git a/tools/ci/gha-install.sh b/tools/ci/gha-install.sh
index 7854a9dfc..fb81fcea2 100755
--- a/tools/ci/gha-install.sh
+++ b/tools/ci/gha-install.sh
@@ -2,12 +2,9 @@
 set -ex
 
 # Upgrade pip, pytest, numpy before doing anything else.
-# TODO: numpy 1.22 results in several failing tests, so we force a lower version
-# for now (similar change made in pyproject.toml). When this is removed, those
-# tests will need to be updated.
 pip install --upgrade pip
 pip install --upgrade pytest
-pip install --upgrade "numpy<1.22"
+pip install --upgrade numpy
 
 # Install NJOY 2016
 ./tools/ci/gha-install-njoy.sh