diff --git a/ChangeLog.rst b/ChangeLog.rst
index 59341c6a..cb67a853 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -1,6 +1,11 @@
 ChangeLog
 #########
 
+* 1.9.20 (2021-10-15)
+
+  * WIP
+  * Fix incomplete ASIO support on Windows
+
 * 1.9.19 (2021-07-15)
 
   * Add jack_position_t::tick_double, and flags around it
diff --git a/common/JackConstants.h b/common/JackConstants.h
index 0cf62ebc..a0b94a57 100644
--- a/common/JackConstants.h
+++ b/common/JackConstants.h
@@ -24,7 +24,7 @@
 #include "config.h"
 #endif
 
-#define VERSION "1.9.19"
+#define VERSION "1.9.20"
 
 #define BUFFER_SIZE_MAX 8192
 
diff --git a/wscript b/wscript
index f0c10b4a..e0d32c8d 100644
--- a/wscript
+++ b/wscript
@@ -11,7 +11,7 @@ import sys
 from waflib import Logs, Options, Task, Utils
 from waflib.Build import BuildContext, CleanContext, InstallContext, UninstallContext
 
-VERSION='1.9.19'
+VERSION='1.9.20'
 APPNAME='jack'
 JACK_API_VERSION = '0.1.0'