diff --git a/lib/dns/api b/lib/dns/api
index e164af2416..06a9880e47 100644
--- a/lib/dns/api
+++ b/lib/dns/api
@@ -1,3 +1,3 @@
-LIBINTERFACE = 3
+LIBINTERFACE = 4
 LIBREVISION = 0
 LIBAGE = 0
diff --git a/lib/isc/api b/lib/isc/api
index e164af2416..06a9880e47 100644
--- a/lib/isc/api
+++ b/lib/isc/api
@@ -1,3 +1,3 @@
-LIBINTERFACE = 3
+LIBINTERFACE = 4
 LIBREVISION = 0
 LIBAGE = 0