diff --git a/deployments/prob140/image/requirements.txt b/deployments/prob140/image/requirements.txt
index 294c78e54..615b49ef9 100644
--- a/deployments/prob140/image/requirements.txt
+++ b/deployments/prob140/image/requirements.txt
@@ -19,3 +19,4 @@ nbresuse==0.3.0
 prob140==0.4.1.2
 gsExport==0.19.1.1
 sympy==1.1.1
+nbconvert==4.3.0