diff --git a/Doxyfile b/Doxyfile
index 2510ab2..9bd8e0f 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -31,7 +31,7 @@ PROJECT_NAME           = "Rubber Band Library"
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 1.9.0
+PROJECT_NUMBER         = 1.9.1
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put. 
diff --git a/rubberband/RubberBandStretcher.h b/rubberband/RubberBandStretcher.h
index ff79e84..bdf3bed 100644
--- a/rubberband/RubberBandStretcher.h
+++ b/rubberband/RubberBandStretcher.h
@@ -24,7 +24,7 @@
 #ifndef RUBBERBAND_STRETCHER_H
 #define RUBBERBAND_STRETCHER_H
     
-#define RUBBERBAND_VERSION "1.9.0"
+#define RUBBERBAND_VERSION "1.9.1"
 #define RUBBERBAND_API_MAJOR_VERSION 2
 #define RUBBERBAND_API_MINOR_VERSION 6
 
diff --git a/rubberband/rubberband-c.h b/rubberband/rubberband-c.h
index f1d2931..c77d59f 100644
--- a/rubberband/rubberband-c.h
+++ b/rubberband/rubberband-c.h
@@ -28,7 +28,7 @@
 extern "C" {
 #endif
 
-#define RUBBERBAND_VERSION "1.9.0"
+#define RUBBERBAND_VERSION "1.9.1"
 #define RUBBERBAND_API_MAJOR_VERSION 2
 #define RUBBERBAND_API_MINOR_VERSION 6