diff --git a/ci/requirements.txt b/ci/requirements.txt
index 74ee896..ee2bcd3 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -4,7 +4,7 @@ numpy==2.0.0
 pandas==2.2.2
 xlrd>=1.0.0
 netcdf4==1.7.1
-cftime==1.6.3
+cftime==1.6.4
 erddapy==2.2.0
 ctd==1.4.6 #python-ctd
 seawater==3.3.5
diff --git a/ci/requirements_dev.txt b/ci/requirements_dev.txt
index 3f754f4..ad6e0f2 100644
--- a/ci/requirements_dev.txt
+++ b/ci/requirements_dev.txt
@@ -4,7 +4,7 @@ numpy==2.0.0
 pandas==2.2.2
 xlrd>=1.0.0
 netcdf4==1.7.1
-cftime==1.6.3
+cftime==1.6.4
 erddapy==2.2.0
 mysql-connector-python==8.4.0
 ctd==1.4.6 #python-ctd