diff --git a/mapping-tools/v1/rnsr/instituts-cnrs/json.ini b/mapping-tools/v1/rnsr/instituts-cnrs/json.ini
index 0ceca93..c537cfb 100644
--- a/mapping-tools/v1/rnsr/instituts-cnrs/json.ini
+++ b/mapping-tools/v1/rnsr/instituts-cnrs/json.ini
@@ -19,6 +19,7 @@
 default = n/a
 primer = ./RNSR_InstitutsCNRS_1614.csv
 file = ./instituts-cnrs.ini
+persistent = true
 
 [assign]
 path = value