diff --git a/gerbolyze/__init__.py b/gerbolyze/__init__.py
index fc5525e..5a9994e 100755
--- a/gerbolyze/__init__.py
+++ b/gerbolyze/__init__.py
@@ -21,7 +21,7 @@ import click
 
 import gerbonara as gn
 
-__version__ = '3.1.6'
+__version__ = '3.1.7'
 
 @click.group()
 def cli():
diff --git a/svg-flatten/include/gerbolyze.hpp b/svg-flatten/include/gerbolyze.hpp
index 2b3652c..f91c966 100644
--- a/svg-flatten/include/gerbolyze.hpp
+++ b/svg-flatten/include/gerbolyze.hpp
@@ -31,7 +31,7 @@
 
 namespace gerbolyze {
 
-    constexpr char lib_version[] = "2.0";
+    constexpr char lib_version[] = "3.1.7";
 
     typedef std::function<std::vector<d2p> *(double, double, double)> sampling_fun;