diff --git a/nonlib/NSM/Client.C b/nonlib/NSM/Client.C
index 585d277..fae4b9c 100644
--- a/nonlib/NSM/Client.C
+++ b/nonlib/NSM/Client.C
@@ -80,8 +80,8 @@ namespace NSM
                             application_name,
                             capabilities,
                             process_name,
-                            0, /* api_major_version */
-                            5, /* api_minor_version */
+                            1, /* api_major_version */
+                            0, /* api_minor_version */
                             pid );
 
         lo_address_free( to );
diff --git a/session-manager/src/nsmd.C b/session-manager/src/nsmd.C
index 9e94110..c7c549c 100644
--- a/session-manager/src/nsmd.C
+++ b/session-manager/src/nsmd.C
@@ -59,8 +59,8 @@ static int signal_fd;
 static int session_lock_fd = 0;
 static char *session_root;
 
-#define NSM_API_VERSION_MAJOR 0
-#define NSM_API_VERSION_MINOR 3
+#define NSM_API_VERSION_MAJOR 1
+#define NSM_API_VERSION_MINOR 0
 
 #define ERR_OK 0
 #define ERR_GENERAL_ERROR    -1