diff --git a/src/include/pegasus/version.h b/src/include/pegasus/version.h
index 18cc6ae3981bc0a8452fae05562d28331abbff25..c9563c32e3e3e30dc9fd09c37efcbf63f54eb95a 100644
--- a/src/include/pegasus/version.h
+++ b/src/include/pegasus/version.h
@@ -3,4 +3,4 @@
 // can be found in the LICENSE file in the root directory of this source tree.
 
 #pragma once
-#define PEGASUS_VERSION "1.9.0"
+#define PEGASUS_VERSION "1.9.1"