diff --git a/README.md b/README.md
index 32aabc7..566ca6b 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ The **performance measurement tool** can be compiled with:
 
 ````g++ -std=c++20 -mavx -Ofast tiny_bvh_speedtest.cpp -o tiny_bvh_speedtest````
 
-# Version 1.1.8
+# Version 1.1.9
 
 Version 1.1.0 introduced a <ins>change to the API</ins>. The single BVH class with multiple layouts has been replaced with a BVH class per layout. You can simply instantiate the desired layout; conversion (and data ownership) is then handled properly by the library. Examples:
 
diff --git a/tiny_bvh.h b/tiny_bvh.h
index 3f93057..b74f248 100644
--- a/tiny_bvh.h
+++ b/tiny_bvh.h
@@ -117,7 +117,7 @@ THE SOFTWARE.
 // library version
 #define TINY_BVH_VERSION_MAJOR	1
 #define TINY_BVH_VERSION_MINOR	1
-#define TINY_BVH_VERSION_SUB	8
+#define TINY_BVH_VERSION_SUB	9
 
 // ============================================================================
 //