diff --git a/environment_files/requirements_linux.txt b/environment_files/requirements_linux.txt
index fef76f7..11dee08 100644
--- a/environment_files/requirements_linux.txt
+++ b/environment_files/requirements_linux.txt
@@ -1,7 +1,7 @@
 asn1crypto==0.24.0
 basemap==1.2.1
 Cartopy==0.17.0
-certifi==2019.6.16
+certifi==2022.12.7
 cffi==1.12.3
 chardet==3.0.4
 cryptography==2.7
diff --git a/environment_files/requirements_osx.txt b/environment_files/requirements_osx.txt
index 95f800e..84813b7 100644
--- a/environment_files/requirements_osx.txt
+++ b/environment_files/requirements_osx.txt
@@ -1,7 +1,7 @@
 asn1crypto==0.24.0
 basemap==1.2.0
 Cartopy==0.16.0
-certifi==2019.6.16
+certifi==2022.12.7
 cffi==1.12.3
 chardet==3.0.4
 cryptography==2.7