diff --git a/g-cloud/requirements.txt b/g-cloud/requirements.txt
index 54cb0b2..724688d 100644
--- a/g-cloud/requirements.txt
+++ b/g-cloud/requirements.txt
@@ -29,7 +29,7 @@ bokeh==1.4.0
 boto==2.49.0
 Bottleneck==1.3.2
 cachetools==3.1.1
-certifi==2019.11.28
+certifi==2022.12.7
 cffi==1.14.0
 chardet==3.0.4
 Click==7.0