diff --git a/doxygen.cfg b/doxygen.cfg
index aa835c49..ee78cec1 100644
--- a/doxygen.cfg
+++ b/doxygen.cfg
@@ -31,7 +31,7 @@ PROJECT_NAME           = "Intel SPMD Program Compiler"
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 1.9.1dev
+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/ispc_version.h b/ispc_version.h
index 001c1d33..223d67cc 100644
--- a/ispc_version.h
+++ b/ispc_version.h
@@ -38,7 +38,7 @@
 #ifndef ISPC_VERSION_H
 #define ISPC_VERSION_H
 
-#define ISPC_VERSION "1.9.1dev"
+#define ISPC_VERSION "1.9.1"
 #include "llvm/Config/llvm-config.h"
 
 #define ISPC_LLVM_VERSION ( LLVM_VERSION_MAJOR * 10000 + LLVM_VERSION_MINOR * 100 )