diff --git a/ci/doc_requirements.txt b/ci/doc_requirements.txt
index 9ce25d04446..bac34ce2923 100644
--- a/ci/doc_requirements.txt
+++ b/ci/doc_requirements.txt
@@ -1,6 +1,6 @@
 sphinx==3.2.1
 sphinx-gallery==0.7
 myst-parser==0.11.2
-netCDF4==1.5.3
+netCDF4==1.5.4
 # Needed for sphinx-gallery, which refuses to list dependencies
 pillow==7.2.0
diff --git a/ci/test_requirements.txt b/ci/test_requirements.txt
index de04e3ffd33..d4e3ebc9b35 100644
--- a/ci/test_requirements.txt
+++ b/ci/test_requirements.txt
@@ -1,4 +1,4 @@
 pytest==6.0.1
 pytest-cov==2.10.1
 pytest-mpl==0.11
-netCDF4==1.5.3
+netCDF4==1.5.4