diff --git a/requirements.txt b/requirements.txt
index fbd51c2..aec304f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 qiskit
 matplotlib
 pylatexenc
-git+https://github.com/qiskit-community/qiskit-textbook.git#subdirectory=qiskit-textbook-src
\ No newline at end of file
+git+https://github.com/qiskit-community/qiskit-textbook.git#subdirectory=qiskit-textbook-src
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file