diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9616fa6..8094279 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -11,7 +11,7 @@
 -i https://pypi.org/simple
 appdirs==1.4.4
 attrs==20.3.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-certifi==2020.12.5
+certifi==2022.12.7
 chardet==4.0.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 coverage==5.4; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'
 coveralls==3.0.0
diff --git a/requirements.txt b/requirements.txt
index e3c32bc..4b6944e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 #
 
 -i https://pypi.org/simple
-certifi==2020.12.5
+certifi==2022.12.7
 chardet==4.0.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 diskcache==5.2.1
 ecdsa==0.14.1; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'