diff --git a/src_main/piversion.h b/src_main/piversion.h
index 2bdd3078..96fb7f0f 100644
--- a/src_main/piversion.h
+++ b/src_main/piversion.h
@@ -4,7 +4,7 @@
 
 #define PIP_VERSION_MAJOR      1
 #define PIP_VERSION_MINOR      9
-#define PIP_VERSION_REVISION   0
-#define PIP_VERSION_SUFFIX     "_alpha_2"
+#define PIP_VERSION_REVISION   1
+#define PIP_VERSION_SUFFIX     "_beta"
 
 #endif // PIVERSION_H