diff --git a/xs/src/libslic3r/libslic3r.h b/xs/src/libslic3r/libslic3r.h
index 4b1c1b5e6..5aa7866b8 100644
--- a/xs/src/libslic3r/libslic3r.h
+++ b/xs/src/libslic3r/libslic3r.h
@@ -10,7 +10,7 @@
 #include <stdarg.h>
 
 #define SLIC3R_FORK_NAME "Slic3r Prusa Edition"
-#define SLIC3R_VERSION "1.31.4"
+#define SLIC3R_VERSION "1.31.6"
 
 //FIXME This epsilon value is used for many non-related purposes:
 // For a threshold of a squared Euclidean distance,