diff --git a/requirements-dev.txt b/requirements-dev.txt
index 2b69bb6..4257ae3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 ase==3.17.0
-certifi==2020.11.8
+certifi==2022.12.7
 chardet==3.0.4
 click==7.1.2
 coverage==5.3
diff --git a/requirements.txt b/requirements.txt
index 23ae273..15d522e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 ase==3.17.0
-certifi==2020.11.8
+certifi==2022.12.7
 chardet==3.0.4
 click==7.1.2
 cycler==0.10.0