diff --git a/requirements.txt b/requirements.txt
index 9c51583..5d71965 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 git+https://github.com/cedadev/ceda-elasticsearch-tools.git
 git+https://github.com/Mahir-Sparkess/django-haystack-elasticsearch.git
 asgiref==3.4.1
-certifi==2021.5.30
+certifi==2022.12.7
 cffi==1.14.6
 chardet==4.0.0
 cryptography==3.4.7
diff --git a/requirements_old.txt b/requirements_old.txt
index ab9a657..db82147 100644
--- a/requirements_old.txt
+++ b/requirements_old.txt
@@ -1,6 +1,6 @@
 git+https://github.com/cedadev/ceda-elasticsearch-tools.git
 git+https://github.com/cedadev/django-haystack-elasticsearch.git
-certifi==2019.11.28
+certifi==2022.12.7
 cffi==1.14.0
 chardet==3.0.4
 cryptography==3.3.2