diff --git a/requirements.txt b/requirements.txt
index 117013aad389079f0211213bfa960eb5056355bb..d66d4c5d2dbe422bc19b65d443ea9ebe450681b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,8 @@
 git+file:///gpfs/exfel/sw/calsoft/git/cal_db_interactive@2.0.1
 git+file:///gpfs/exfel/sw/calsoft/git/nbparameterise@0.3
 git+file:///gpfs/exfel/sw/calsoft/git/pyDetLib@2.5.6-2.10.0#subdirectory=lib
+Cython == 0.29.21
+Jinja2 == 2.11.2
 astcheck == 0.2.5
 astsearch == 0.1.3
 dill == 0.3.0