diff --git a/tests/requirements_frozen.txt b/tests/requirements_frozen.txt
index f1994e0e..a92f1c8a 100644
--- a/tests/requirements_frozen.txt
+++ b/tests/requirements_frozen.txt
@@ -1,5 +1,5 @@
 backcall==0.2.0
-certifi==2022.12.7
+certifi==2023.7.22
 chardet==4.0.0
 ConnPlotter==0.7a0
 cycler==0.10.0