diff --git a/resources/sql/060_vocabulary-schema.sql b/resources/sql/060_vocabulary-schema.sql
index c1883a4..7caf1df 100644
--- a/resources/sql/060_vocabulary-schema.sql
+++ b/resources/sql/060_vocabulary-schema.sql
@@ -5,8 +5,9 @@ CREATE TABLE IF NOT EXISTS edc_vocabulary
     created_at         BIGINT  NOT NULL,
     json_schema        JSON    DEFAULT '{}',
     name               VARCHAR NOT NULL,
-    category           VARCHAR NOT NULL,
-    PRIMARY KEY (id)
+    connector_id       VARCHAR NOT NULL,
+    category           VARCHAR NOT NULL
+    PRIMARY KEY (id, connector_id)
 );
 
-COMMENT ON COLUMN edc_vocabulary.json_schema IS 'JSON Schema with the vocabulary';
+COMMENT ON COLUMN edc_vocabulary.json_schema IS 'JSON Schema with the vocabulary';
\ No newline at end of file