diff --git a/doc/requirements.txt b/doc/requirements.txt
index 602c9186..7db99b45 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -4,7 +4,7 @@ Pillow==9.2.0
 Sphinx==5.1.1
 sphinx-rtd-theme==1.0.0
 ipython==8.4.0
-netCDF4==1.6.0
+netCDF4==1.6.3
 xarray==2022.6.0
 matplotlib==3.5.3
 cmocean==2.0