diff --git a/ShellB3/shallbethree.sh b/ShellB3/shallbethree.sh
index 7ba5ce7a957a87d0da4f92406bede056199bbc1f..baf36de35774cb557851b617348657da107519b0 100755
--- a/ShellB3/shallbethree.sh
+++ b/ShellB3/shallbethree.sh
@@ -571,7 +571,7 @@ export MOCKVER=2.0.0
 export MATPLOTLIBVER=1.5.1
 export GEOSVER=3.5.0
 export BASEMAPVER=1.0.7
-export CDF4VER=4.1.3
+export CDF4VER=4.2.1.1
 export CDF4CXXVER=4.2.1
 export CDF4FORVER=4.4.3
 export PYCDFVER=0.6-3b
diff --git a/ShellB3/src/optional/netcdf-4.2.1.1.tar.gz b/ShellB3/src/optional/netcdf-4.2.1.1.tar.gz
new file mode 100644
index 0000000000000000000000000000000000000000..9d14d97968ba617cabceb95cb70f9c6746d8aa06
Binary files /dev/null and b/ShellB3/src/optional/netcdf-4.2.1.1.tar.gz differ