diff --git a/Makefile b/Makefile
index c02e1c7..12830d7 100644
--- a/Makefile
+++ b/Makefile
@@ -4,9 +4,9 @@ KERNEL_MIN=15
 KERNEL_PATCHLEVEL=18
 # increment KREL if the ABI changes (abicheck target in debian/rules)
 # rebuild packages with new KREL and run 'make abiupdate'
-KREL=14
+KREL=15
 
-PKGREL=39
+PKGREL=40
 
 KERNEL_MAJMIN=$(KERNEL_MAJ).$(KERNEL_MIN)
 KERNEL_VER=$(KERNEL_MAJMIN).$(KERNEL_PATCHLEVEL)
diff --git a/debian/changelog b/debian/changelog
index f878d3d..b282194 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+pve-kernel (4.15.18-40) unstable; urgency=medium
+
+  * update to Ubuntu-4.15.0-51.55
+
+  * bump ABI to 4.15.18-15
+
+ -- Proxmox Support Team <support@proxmox.com>  Tue, 21 May 2019 17:43:20 +0200
+
 pve-kernel (4.15.18-39) unstable; urgency=medium
 
   * update to Ubuntu-4.15.0-50.54 with MDS mitigations