diff --git a/biblio-tools/v1/crossref/prefixes/expand.ini b/biblio-tools/v1/crossref/prefixes/expand.ini
index 28b13d5..e293be1 100644
--- a/biblio-tools/v1/crossref/prefixes/expand.ini
+++ b/biblio-tools/v1/crossref/prefixes/expand.ini
@@ -26,8 +26,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [expand]
 path = value
diff --git a/biblio-tools/v1/istex/works/expand.ini b/biblio-tools/v1/istex/works/expand.ini
index 7eb75ce..808fe5a 100644
--- a/biblio-tools/v1/istex/works/expand.ini
+++ b/biblio-tools/v1/istex/works/expand.ini
@@ -27,8 +27,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [bufferize]
 
diff --git a/biblio-tools/v1/unpaywall/corhal.ini b/biblio-tools/v1/unpaywall/corhal.ini
index 56d284b..66a82fa 100644
--- a/biblio-tools/v1/unpaywall/corhal.ini
+++ b/biblio-tools/v1/unpaywall/corhal.ini
@@ -26,8 +26,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [env]
 path = size
diff --git a/biblio-tools/v1/unpaywall/expand.ini b/biblio-tools/v1/unpaywall/expand.ini
index f3b5975..6ef6d5d 100644
--- a/biblio-tools/v1/unpaywall/expand.ini
+++ b/biblio-tools/v1/unpaywall/expand.ini
@@ -26,8 +26,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [env]
 path = size
diff --git a/biblio-tools/v1/unpaywall/is_oa.ini b/biblio-tools/v1/unpaywall/is_oa.ini
index 8c32033..dbbaa77 100644
--- a/biblio-tools/v1/unpaywall/is_oa.ini
+++ b/biblio-tools/v1/unpaywall/is_oa.ini
@@ -26,8 +26,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [env]
 path = size