diff --git a/CHANGES.txt b/CHANGES.txt
index 7ebc1a03..725d6ea3 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,9 +1,10 @@
 CHANGES
 =======
 
-0.3.1 (YYYY-MM-DD)
+0.3.1 (2018-07-03)
 ------------------
 
+* Added the stacktrace command #120 (thanks @agronholm)
 
 
 0.3.0 (2017-09-08)
diff --git a/aiomonitor/__init__.py b/aiomonitor/__init__.py
index 523251ba..166c155f 100644
--- a/aiomonitor/__init__.py
+++ b/aiomonitor/__init__.py
@@ -26,4 +26,4 @@
 
 __all__ = ('Monitor', 'start_monitor', 'MONITOR_HOST', 'MONITOR_PORT',
            'CONSOLE_PORT')
-__version__ = '0.3.1a0'
+__version__ = '0.3.1'
diff --git a/docs/tutorial.rst b/docs/tutorial.rst
index 75fd4350..86c60075 100644
--- a/docs/tutorial.rst
+++ b/docs/tutorial.rst
@@ -66,6 +66,7 @@ Once connection established, one can type commands, for instance ``help``::
                  where taskid     : Show stack frames for a task
                  cancel taskid    : Cancel an indicated task
                  signal signame   : Send a Unix signal
+                 stacktrace       : Print a stack trace from the event loop thread
                  console          : Switch to async Python REPL
                  quit             : Leave the monitor
 
@@ -75,6 +76,7 @@ Library will respond with list of supported commands:
 * *where* -- prints stack frame for the task, taskid must be supplied
 * *cancel* -- command cancels task, taskid must be supplied
 * *signal* -- command sends unix signal to the app process
+* *stacktrace* -- prints a stack trace from the event loop thread
 * *console* -- switch to python REPL
 * *quit* -- stops telnet session