diff --git a/include/mimalloc.h b/include/mimalloc.h
index 05cf92e4..254a7d9c 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -8,7 +8,7 @@ terms of the MIT license. A copy of the license can be found in the file
 #ifndef MIMALLOC_H
 #define MIMALLOC_H
 
-#define MI_MALLOC_VERSION 166   // major + 2 digits minor
+#define MI_MALLOC_VERSION 167   // major + 2 digits minor
 
 // ------------------------------------------------------
 // Compiler specific attributes
diff --git a/readme.md b/readme.md
index bf879d49..9419a658 100644
--- a/readme.md
+++ b/readme.md
@@ -11,7 +11,7 @@ mimalloc (pronounced "me-malloc")
 is a general purpose allocator with excellent [performance](#performance) characteristics.
 Initially developed by Daan Leijen for the run-time systems of the
 [Koka](https://github.com/koka-lang/koka) and [Lean](https://github.com/leanprover/lean) languages.
-Latest release:`v1.6.6` (2020-09-24).
+Latest release:`v1.6.7` (2020-09-24).
 
 It is a drop-in replacement for `malloc` and can be used in other programs
 without code changes, for example, on dynamically linked ELF-based systems (Linux, BSD, etc.) you can use it as:
@@ -73,7 +73,7 @@ Enjoy!
 
 ### Releases
 
-* 2020-09-24, `v1.6.6`: stable release 1.6: using standard C atomics, passing tsan testing, improved
+* 2020-09-24, `v1.6.7`: stable release 1.6: using standard C atomics, passing tsan testing, improved
   handling of failing to commit on Windows, add [`mi_process_info`](https://github.com/microsoft/mimalloc/blob/master/include/mimalloc.h#L156) api call.
 * 2020-08-06, `v1.6.4`: stable release 1.6: improved error recovery in low-memory situations,
   support for IllumOS and Haiku, NUMA support for Vista/XP, improved NUMA detection for AMD Ryzen, ubsan support.