diff --git a/ci/requirements.txt b/ci/requirements.txt
index 4fbea9c6def..21c0a04faf1 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -5,7 +5,7 @@ numpy==1.21.5
 pandas==1.3.5
 pooch==1.6.0
 pint==0.18
-pyproj==3.2.1
+pyproj==3.4.1
 scipy==1.7.3
 traitlets==5.1.1
 xarray==0.20.2