diff --git a/xs/src/libslic3r/libslic3r.h b/xs/src/libslic3r/libslic3r.h
index e4d318e5e..1a02605e1 100644
--- a/xs/src/libslic3r/libslic3r.h
+++ b/xs/src/libslic3r/libslic3r.h
@@ -14,7 +14,7 @@
 #include <boost/thread.hpp>
 
 #define SLIC3R_FORK_NAME "Slic3r Prusa Edition"
-#define SLIC3R_VERSION "1.38.6"
+#define SLIC3R_VERSION "1.39.0"
 #define SLIC3R_BUILD "UNKNOWN"
 
 typedef long coord_t;