diff --git a/README.md b/README.md
index b3a9e78e..ef312359 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Citation
     author       = {{Alexander Voigt}},
     title        = {{Polylogarithm}},
     year         = "2021",
-    version      = {6.3.0},
+    version      = {6.4.0},
     url          = {https://github.com/Expander/polylogarithm},
     note         = "[License: MIT]"
 }
diff --git a/src/version.h b/src/version.h
index 2d4531a9..851b0f52 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,3 +1,3 @@
 #define POLYLOGARITHM_MAJOR 6
-#define POLYLOGARITHM_MINOR 3
+#define POLYLOGARITHM_MINOR 4
 #define POLYLOGARITHM_PATCH 0