diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index c29a54620..9756b73d2 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -8,7 +8,7 @@ defusedxml>=0.7.1
 filelock>=3.9.0
 flask>=2.2.2
 flask-cors>=4.0.0
-glymur>=0.12.7
+glymur>=0.12.7, < 0.14 # 0.14 is not compatible with python3.9
 imagecodecs>=2022.9.26
 joblib>=1.1.1
 jupyterlab>=3.5.2