diff --git a/CHANGES b/CHANGES
index 9b28edaa86accd4b55e86095334d41c06d8c7dfe..231ef2a7ad739b59fd854af8fd37970ee10b27ce 100644
--- a/CHANGES
+++ b/CHANGES
@@ -25,6 +25,7 @@ ARI
    ContactStatusChange. In particular, these events are useful when subscribing
    to all event sources, as they provide additional endpoint related
    information beyond the addition/removal of channels from an endpoint.
+   The ARI version has been bumped to 1.9.0 as a result.
 
  * Added the ability to subscribe to all ARI events in Asterisk, regardless
    of whether the application 'controls' the resource. This is useful for
diff --git a/UPGRADE.txt b/UPGRADE.txt
index 766ab23ee458ae1afa4b83bae097300a614b1c5d..27ca0e6cce985f09b2c6d9e1397932d1eea5c9f0 100644
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -21,6 +21,12 @@
 === UPGRADE-12.txt  -- Upgrade info for 11 to 12
 ===========================================================
 
+From 13.5.0 to 13.6.0:
+
+ARI:
+ - The version of ARI has been updated to 1.9.0 to reflect the backwards
+   compatible changes outlined in the CHANGES file.
+
 From 13.4.0 to 13.5.0:
 
 AMI:
diff --git a/rest-api/api-docs/applications.json b/rest-api/api-docs/applications.json
index 446dfddc0531ee9dd4c68002ab9cbe58219203a1..c8660cfc625752e1c4f0f04dc45aec55fd7af9a3 100644
--- a/rest-api/api-docs/applications.json
+++ b/rest-api/api-docs/applications.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/applications.{format}",
diff --git a/rest-api/api-docs/asterisk.json b/rest-api/api-docs/asterisk.json
index 44bf024f81ba80410f86704ce2e2078fca4ca71f..9dbf38227f71f868d1081c1bd61d5cfe29ca811b 100644
--- a/rest-api/api-docs/asterisk.json
+++ b/rest-api/api-docs/asterisk.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/asterisk.{format}",
diff --git a/rest-api/api-docs/bridges.json b/rest-api/api-docs/bridges.json
index 4bbbe100f29f50df6d0b1a5ce8c0021e5d74e170..0e726a536e5bdaa28bd67329408472dfa02d3464 100644
--- a/rest-api/api-docs/bridges.json
+++ b/rest-api/api-docs/bridges.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/bridges.{format}",
diff --git a/rest-api/api-docs/channels.json b/rest-api/api-docs/channels.json
index 1b7faf754b0d0aa665b65f0761059689141e15e5..cb41fb681658732822436081383517144f683729 100644
--- a/rest-api/api-docs/channels.json
+++ b/rest-api/api-docs/channels.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/channels.{format}",
diff --git a/rest-api/api-docs/deviceStates.json b/rest-api/api-docs/deviceStates.json
index fa68dcf2b1b25b42eb5cd746abf7f2b12961b759..a268a187368617b02b6d4e32216aecf8badc002b 100644
--- a/rest-api/api-docs/deviceStates.json
+++ b/rest-api/api-docs/deviceStates.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "Kevin Harwell <kharwell@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/deviceStates.{format}",
diff --git a/rest-api/api-docs/endpoints.json b/rest-api/api-docs/endpoints.json
index 73467731977c9120f07c94846eb2d5b36cef1a85..c6a3020cfe3a105bf8323ed189313cf00a86ce46 100644
--- a/rest-api/api-docs/endpoints.json
+++ b/rest-api/api-docs/endpoints.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/endpoints.{format}",
diff --git a/rest-api/api-docs/events.json b/rest-api/api-docs/events.json
index e62fbcb96877ba03c4f114375af24d23399b4cca..464e06faf96d98dee308637b21d7b327467a3b88 100644
--- a/rest-api/api-docs/events.json
+++ b/rest-api/api-docs/events.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.2",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/events.{format}",
diff --git a/rest-api/api-docs/mailboxes.json b/rest-api/api-docs/mailboxes.json
index 12b8832d577dda3559bee29855816f65964b63bf..5b290fcdf4cbd3aa2e39b6e338408ed2d1513ec3 100644
--- a/rest-api/api-docs/mailboxes.json
+++ b/rest-api/api-docs/mailboxes.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2013, Digium, Inc.",
 	"_author": "Jonathan Rose <jrose@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/mailboxes.{format}",
diff --git a/rest-api/api-docs/playbacks.json b/rest-api/api-docs/playbacks.json
index d9683801afdbe16541dd12c4a91ce15931cee0ff..e6cb7493fd4ac39ae9b8dc9b2bfe0e8a50416864 100644
--- a/rest-api/api-docs/playbacks.json
+++ b/rest-api/api-docs/playbacks.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/playbacks.{format}",
diff --git a/rest-api/api-docs/recordings.json b/rest-api/api-docs/recordings.json
index 8686e882bd847aab8eca1cc531fb68110c03b9c7..bc2b9027c391bdb74cbf9765de0fa32098aaacc4 100644
--- a/rest-api/api-docs/recordings.json
+++ b/rest-api/api-docs/recordings.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/recordings.{format}",
diff --git a/rest-api/api-docs/sounds.json b/rest-api/api-docs/sounds.json
index 4cfa7ed4dea5aa03a3998508a04528a2be35be41..70d65a4e3e308fd7ece50bd2a98fce959b7b40ee 100644
--- a/rest-api/api-docs/sounds.json
+++ b/rest-api/api-docs/sounds.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"resourcePath": "/api-docs/sounds.{format}",
diff --git a/rest-api/resources.json b/rest-api/resources.json
index 995303dd5fed52af24b9e62cd303bb456c5f5165..bacbc786f88b780290b8a0e4c393e982dd82b95d 100644
--- a/rest-api/resources.json
+++ b/rest-api/resources.json
@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "1.8.0",
+	"apiVersion": "1.9.0",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"apis": [