diff --git a/build.gradle b/build.gradle
index 35615ffeff..400a57fe44 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,7 +12,7 @@ apply plugin: 'maven'
 
 allprojects {
     group = 'io.digdag'
-    version = '0.9.39-SNAPSHOT'
+    version = '0.9.39'
 
     ext {
         isSnapshotRelease = version.endsWith('-SNAPSHOT')
diff --git a/digdag-cli/src/main/java/io/digdag/cli/SelfUpdate.java b/digdag-cli/src/main/java/io/digdag/cli/SelfUpdate.java
index 04806d4808..d9f641cdde 100644
--- a/digdag-cli/src/main/java/io/digdag/cli/SelfUpdate.java
+++ b/digdag-cli/src/main/java/io/digdag/cli/SelfUpdate.java
@@ -90,7 +90,7 @@ public SystemExitException usage(String error)
         err.println("");
         err.println("  Examples:");
         err.println("    $ " + programName + " selfupdate");
-        err.println("    $ " + programName + " selfupdate 0.9.39-SNAPSHOT");
+        err.println("    $ " + programName + " selfupdate 0.9.39");
         err.println("");
         return systemExit(error);
     }
diff --git a/digdag-client/src/main/resources/io/digdag/client/version.txt b/digdag-client/src/main/resources/io/digdag/client/version.txt
index 42d8cc95c5..9e283c5b28 100644
--- a/digdag-client/src/main/resources/io/digdag/client/version.txt
+++ b/digdag-client/src/main/resources/io/digdag/client/version.txt
@@ -1 +1 @@
-0.9.39-SNAPSHOT
+0.9.39
diff --git a/digdag-docs/src/command_reference.rst b/digdag-docs/src/command_reference.rst
index fa0d0a1e2d..6d7e94c7f5 100644
--- a/digdag-docs/src/command_reference.rst
+++ b/digdag-docs/src/command_reference.rst
@@ -241,7 +241,7 @@ Updates the executable binary file to the latest version or specified version. E
 .. code-block:: console
 
     $ digdag selfupdate
-    $ digdag selfupdate 0.9.38
+    $ digdag selfupdate 0.9.39
 
 Server-mode commands
 ----------------------------------
diff --git a/digdag-docs/src/releases.rst b/digdag-docs/src/releases.rst
index 0609a488a6..e7a5e3b388 100644
--- a/digdag-docs/src/releases.rst
+++ b/digdag-docs/src/releases.rst
@@ -5,6 +5,7 @@ Release Notes
     :maxdepth: 1
 
     # add new version here
+    releases/release-0.9.39
     releases/release-0.9.38
     releases/release-0.9.37
     releases/release-0.9.36
diff --git a/digdag-docs/src/releases/release-0.9.39.rst b/digdag-docs/src/releases/release-0.9.39.rst
new file mode 100644
index 0000000000..60adbf318c
--- /dev/null
+++ b/digdag-docs/src/releases/release-0.9.39.rst
@@ -0,0 +1,26 @@
+Release 0.9.39
+==============
+
+General Changes
+---------------
+
+* Introduce Authenticator SPI. [#1098]
+* Introduce basic auth authenticator. [#1099]
+
+This release changed Authenticator interface. Please take care if you use DigdagEmbed and customize Authenticator.
+
+Fixed Issues
+------------
+* Build/CI improvements.
+* Update some packages for security vulnerabilities.
+
+Release Date
+------------
+2019-07-17
+
+Contributors
+------------
+* Pierre Delagrave
+* Shota Suzuki
+* Muga Nishizawa
+* You Yamagata