diff --git a/modules/Bio/EnsEMBL/Registry.pm b/modules/Bio/EnsEMBL/Registry.pm
index fbdfc92db2bf6ef03ef707bfb7bdec825bacd16f..b39a6afa542e223b99acecac5d612c2da94bbdaf 100644
--- a/modules/Bio/EnsEMBL/Registry.pm
+++ b/modules/Bio/EnsEMBL/Registry.pm
@@ -129,7 +129,7 @@ use DBI;
 
 use vars qw(%registry_register);
 
-my $API_VERSION = 54;
+my $API_VERSION = 55;
 
 # This is a map from group names to Ensembl DB adaptors.  Used by
 # load_all() and reset_DBAdaptor().