diff --git a/requirements.txt b/requirements.txt
index 7401f70..43e9dda 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 wheel==0.40.0
 sphinxcontrib-blockdiag==1.5.5
 sphinx==7.0.1
-mock==2.0.0
+mock==5.1.0
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 requests==2.31.0