diff --git a/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql b/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
index 0a57fd627b58aabe2c73e50cc4fef433306a6485..9f8be9d86a34aea28f5cd748446771a6605aca3f 100644
--- a/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
+++ b/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
@@ -159,7 +159,7 @@ INSERT INTO MM_vocabulary (enum_val, enum_str, enum_display_str) VALUES
 -- ===========
 
 -- climatic zones
--- see http://eusoils.jrc.eu.europa.eu/projects/RenewableEnergy
+-- see https://esdac.jrc.ec.europa.eu/projects/RenewableEnergy/
 
 CREATE TABLE IF NOT EXISTS CZ_vocabulary (
     enum_val         INT NOT NULL,