diff --git a/doc/Doxyfile b/doc/Doxyfile
index d01b02e..40e04dd 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = LibTomCrypt
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.18.0-rc3
+PROJECT_NUMBER         = 1.18.0-rc4
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/src/headers/tomcrypt.h b/src/headers/tomcrypt.h
index 8c9b36f..96b0e3a 100644
--- a/src/headers/tomcrypt.h
+++ b/src/headers/tomcrypt.h
@@ -27,7 +27,7 @@ extern "C" {
 
 /* version */
 #define CRYPT   0x0118
-#define SCRYPT  "1.18.0-rc3"
+#define SCRYPT  "1.18.0-rc4"
 
 /* max size of either a cipher/hash block or symmetric key [largest of the two] */
 #define MAXBLOCKSIZE  128